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Alina Gil

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Papers by Alina Gil

New ternary MgCo2Ga5 and MgNi2Ga5 gallides

Zeitschrift für Kristallographie - Crystalline Materials

The crystal structure of new isostructural compounds MgCo2Ga5 and MgNi2Ga5 has been investigated ... more The crystal structure of new isostructural compounds MgCo2Ga5 and MgNi2Ga5 has been investigated using single-crystal X-ray diffraction. Both compounds represent a new type of structure: orthorhombic, space group Pnnm, oP16, with the following lattice parameters: a = 6.2700(2) Å, b = 6.6946(2) Å, c = 6.0789(2) Å (for MgCo2Ga5) and a = 6.2693(3) Å, b = 6.6968 Å, c = 6.0794 Å (for MgNi2Ga5). The MgCo2Ga5 and MgNi2Ga5 are closely related to the tetragonal structure of CoGa3 which crystallizes in the ht-IrIn3 type. The orthorhombic structures of MgCo2Ga5 and MgNi2Ga5 are derived from CoGa3 via a translationengleiche symmetry reduction of index 2. The symmetry reduction from P42/mnm to Pnnm causes that the 4c site splits into two sites 2c and 2d. The gallium atoms together with cobalt or nickel form 3D-nets with channels, in which magnesium atoms are inserted. The formation of these polyatomic nets is confirmed by distribution of electron localization function (ELF) and charges of atoms.

Safety issues in use of natural gas

Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa, 2015

Streszczenie. W XXI wieku gaz ziemny jest jednym z najbardziej znac ców energetycznych na dowiska... more Streszczenie. W XXI wieku gaz ziemny jest jednym z najbardziej znac ców energetycznych na dowiska. Zanieczyszczenia, które wydzielaj mniejsze ni w przypadku zmiennej wysokiej warto Celem pracy jest analiza systemów zabezpiecze ków z udziałem gazu ziemnego oraz zbadanie poziomu nej dotycz cej bezpiecze Słowa kluczowe: gaz ziemny, instalacja gazowa, systemy zabezpiecze SAFETY Summary. In the twenty resources in the world as well as extremely safe and environmentally inants that are released in the process of combusti energy sources, while maintaining a constant high c The aim of the study is to volving natural gas and to examine the level of knowled in use of natural gas.

Influence of information and communication technology security management in the implementation of ICT for educational purposes at high school : case study of Radom region

Security becomes more and more important in all aspects of our lives and Schools are aware that i... more Security becomes more and more important in all aspects of our lives and Schools are aware that it has become a management problem. In this paper we analyze the obstacles of ICT use for education purposes at school in the Radom region. Is it a lack of ICT security management systems or may be lack of Information and Com- munication Technology knowledge the reason why this important instrument is not fully implemented in the educational system in this region? To this and other questions we will give answer in this research based on OLAREX 1 survey results.

Structure and Magnetic Properties of Ternary R-Ge-SN Systems

Educational Model for Cross-Generational Collaboration

ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, 2021

The paper's considerations relate to an Erasmus+ project called Generation: Smart. Social Com... more The paper's considerations relate to an Erasmus+ project called Generation: Smart. Social Competences Transmedia Bridge To Cultivate A New Culture For Cross-Generational Collaboration. The consortium agreed that due to profound changes in the contemporary Network Societies, people of various generations have to collaborate. However, it is a complex issue due to the divergent life purposes of different aged people. Thus, the project's targeted group, i.e., educators who support adult learners, should be equipped with an educational model that constitutes a solution to this situation. The assumption was that such a model is to include social competences enabling the processes of cross-generational collaboration. Information technology transmedia blend is supposed to bridge the gap between generations. In the paper, we present an overlook of the research that focuses on developing such a framework model. The research features triangulation, which means the analysis of both quan...

Creating Intrapreneurship as an Area of Corporate Entrepreneurship

SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, 2020

The article focuses on the characteristics of intrapreneurship as an area of corporate entreprene... more The article focuses on the characteristics of intrapreneurship as an area of corporate entrepreneurship. Attention was paid to the essence and importance of intrapreneurship in the organization. Then, based on the analysis of activities supporting intrapreneurship undertaken in an international corporation of the banking sector and literature research on this subject, a model was developed to stimulate the creation of intrapreneurship within large organizations. The tools used in the model are divided into tools from the category of people management (soft) and tools related to working methods.

Susceptibility of the Rare Earth Ternary RNiSi2and RNiGe2Compounds

Acta Physica Polonica A, 1994

The ternary silicides and germanides RNiX 2 (R-rare earth, X = Si or Ge) with the orthorhombic Ce... more The ternary silicides and germanides RNiX 2 (R-rare earth, X = Si or Ge) with the orthorhombic CeNiSi 2-type structure are investigated by magnetometric measurements. CeNiSi 2 , CeNiGe2 and SmNiGe 2 have a nonmagnetic state in low temperatures. The compounds with R = Pr and Nd are ferromagnets while those containing R = Gd-Er are antiferromagnets. The de Gennes scaling of the Néel temperatures indicates a strong influence of the crystalline-electric field effects.

Magnetic Properties of TbFe0.25Ge2, TbSn0.4Ge1.4and NdSn0.6Ge1.775Compounds

Acta Physica Polonica A, 2012

The magnetic data of TbFe0.25Ge2, TbSn0.4Ge1.4 and NdSn0.6Ge1.775 compounds are reported. These c... more The magnetic data of TbFe0.25Ge2, TbSn0.4Ge1.4 and NdSn0.6Ge1.775 compounds are reported. These compounds crystallize in the orthorhombic crystal structures described by the space group Cmcm (No. 63) and they are antiferromagnets with the Néel temperatures equal to 19.5, 22 and 3.7 K, respectively.

The Role of the Internet in Self-Study

SOCIETY, INTEGRATION, EDUCATION. Proceedings of the International Scientific Conference, 2015

The concepts of teaching, learning and self-education are the most essential aspects in the proce... more The concepts of teaching, learning and self-education are the most essential aspects in the processes of preparing employees for knowledge economy as well as in the processes of developing and improving skills required not only at work, but also in personal life.The Internet constitutes an essential link in educationasa basic form of teaching and a supplementary element not only in the traditional model of instruction, but also in selfeducation. The following article presents questions concerning self-education and the Internet as a place and technique of self-education, as well as the concept of e-learning as a modern form of distance education.

Magnetic interaction in RTxX2 ternary compounds

MATERIALS SCIENCE-POLAND

ABSTRACT

Psycho-Educational Context of Supporting Seniors in Poland , Using Tools from the Edusenior Project

SOCIETY, INTEGRATION, EDUCATION. Proceedings of the International Scientific Conference, 2015

The purpose of the article was to capture the psycho-educational context of support for Polish se... more The purpose of the article was to capture the psycho-educational context of support for Polish seniors by institutions that have used the methods developed in the Edusenior project. The areas requiring seniors’ education and the scope of work carried out by the developing institutions, government, and NGOs initiatives to raise the quality of life for seniors have been elucidated in the following article. The products obtained from the international Edusenior project, in which the preliminary results were evaluated by experienced Polish reviewers, comply with the above requirements.

Analysis of Selected Areas of Educational Activity of Senior Citizens

SOCIETY, INTEGRATION, EDUCATION. Proceedings of the International Scientific Conference, 2015

The rhythm of development, similar to the rhythm of the changing seasons, is a necessity. We cann... more The rhythm of development, similar to the rhythm of the changing seasons, is a necessity. We cannot avoid old age or death. Just as Autumn may be the most beautiful season of the year, so the old age may be the best stage of life, in which one achieves worldly wisdom and tastes life, while one's life experiences give the sense of solid accomplishment. Nevertheless, there are Autumns which are rainy and fruitless, and so there is old age which is barren, painful, and perhaps even tragic." Antoni Kępiński, Rytm życia (translated by "Gruca-Wolski" s.c.

Magnetic and Electronic Properties of Selected Rare-Earth Chromium Germanides Compounds

Acta Physica Polonica A, 2015

The ternary rare-earth compounds exhibit interesting physical and structural properties. These st... more The ternary rare-earth compounds exhibit interesting physical and structural properties. These structures changing composition and stoichiometry change drastically their magnetic properties. Some of them, based on chromium germanides were studied experimentally concerning their magnetic properties and up to our knowledge they were never studied theoretically explaining nature of their magnetic behaviour. In the presented work the nature and mechanism of the magnetic and electronic properties of rare-earth chromium germanides is presented. The magnetic and electronic properties of RCrGe2 and RCr0.3Ge2 (R = Tb, Dy, Ho or Er) were investigated theoretically applying plane-wave density functional theory/PerdewBurkeErnzerhof methodology. The computational investigations were performed for the stoichiometric and nonstoichiometric crystal structure with the space group Cmcm. The stoichiometry of the rare-earth chromium germanides compounds has signicant eect on the magnetic properties of the investigated material. The theoretical predictions are compared to the experimentally obtained results.

Magnetic Structures of LnNixSn2 (Ln: Tb, Ho) Compounds

ChemInform, 2004

Magnetic properties Magnetic properties D 9000 Magnetic Structures of LnNi x Sn 2 (Ln: Tb, Ho) Co... more Magnetic properties Magnetic properties D 9000 Magnetic Structures of LnNi x Sn 2 (Ln: Tb, Ho) Compounds.-As revealed by powder neutron diffraction, the title compounds TbNi 0.26 Sn 2 and HoNi 0.16 Sn 2 crystallize in the orthorhombic CeNiSi2-type structure. Magnetic and neutron diffraction measurements show that both compounds are antiferromagnets with Neel temperatures of 17.4 K (Ln: Tb) and 6.6 K (Ln: Ho). The magnetic structures of the title compounds are compared with those observed for LnNiSn 2 and the isostructural silicides and germanides.

Magnetic phase transitions in Tb0.4Nd0.6NiGe2 compound

Physica B: Condensed Matter, 2004

ABSTRACT

$Research paper thumbnail of Neutron diffraction studies of RSn1+xGe1−x (R=Tb–Er) compounds$

Neutron diffraction studies of RSn1+xGe1−x (R=Tb–Er) compounds

Journal of Solid State Chemistry, 2011

The magnetic structures of RSn 1 þ x Ge 1 À x (R ¼ Tb, Dy, Ho and Er, x E 0.1) compounds have bee... more The magnetic structures of RSn 1 þ x Ge 1 À x (R ¼ Tb, Dy, Ho and Er, x E 0.1) compounds have been determined by neutron diffraction studies on polycrystalline samples. The data recorded in a paramagnetic state confirmed the orthorhombic crystal structure described by the space group Cmcm. These compounds are antiferromagnets at low temperatures. The magnetic ordering in TbSn 1.12 Ge 0.88 is sine-modulated described by the propagation vector k ¼ (0.4257(2), 0, 0.5880(3)). Tb magnetic moment equals 9.0(1) m B at 1.62 K. It lies in the b-c plane and form an angle y¼17.4(2)1 with the c-axis. This structure is stable up to the N eel temperature equal to 31 K. The magnetic structures of RSn 1 þ x Ge 1 À x , where R are Dy, Ho and Er at low temperatures are described by the propagation vector k ¼ (1/2, 1/2, 0) with the sequence (þþÀ þ) of magnetic moments in the crystal unit cell. In DySn 1.09 Ge 0.91 and HoSn 1.1 Ge 0.9 magnetic moments equal 7.25(15) and 8.60(6) m B at 1.55 K, respectively. The moments are parallel to the c-axis. For Ho-compound this ordering is stable up to T N ¼ 10.7 K. For ErSn 1.08 Ge 0.92 , the Er magnetic moment equals 7.76(7) m B at T¼ 1.5 K and it is parallel to the b-axis. At T t ¼ 3.5 K it tunes into the modulated structure described by the k ¼(0.496(1), 0.446(4), 0). With the increase of temperature there is a slow decrease of k x component and a quick decrease of k y component. The Er magnetic moment is parallel to the b-axis up to 3.9 K while at 4 K and above it lies in the b-c plane and form an angle 48(3)1 with the c-axis. In compounds with R¼ Tb, Ho and Er the magnetostriction effect at the N eel temperature is observed.

New sources and instrumentation for neutron science

Journal of Physics: Conference Series, 2011

ABSTRACT

Structural and magnetic properties of RMnxGe2 (R = Nd,Sm,Gd,Tb,Dy,Ho,Er) intermetallic compounds

Journal of Magnetism and Magnetic Materials, 1994

Magnetic susceptibility and neutron diffraction data show that NdMn0.42Ge2, TbMn0.33Ge2 and HoMn0... more Magnetic susceptibility and neutron diffraction data show that NdMn0.42Ge2, TbMn0.33Ge2 and HoMn0.33Ge2 which exhibit defected CeNiSi2 type crystal structure, order antiferromagnetically (G-mode ordering) below 34 +/- 2, 26 +/- 2 and 7 +/- 2 K with ordered magnetic moments on R3+ ions amounting to 1.55(15), 7.0(1) and 7.3(1) muB respectively. Magnetic susceptibility vs. temperature curves give Néel points at 30

Magnetic properties of RNiSi2 and RNiGe2 compounds

Journal of Magnetism and Magnetic Materials, 1994

ABSTRACT

Crystal and magnetic structure of TbFe0.25Ge2 compound

Journal of Magnetism and Magnetic Materials, 2013

ABSTRACT The crystal and magnetic structure of polycrystalline TbFe0.25Ge2 sample have been deter... more ABSTRACT The crystal and magnetic structure of polycrystalline TbFe0.25Ge2 sample have been determined. X-ray and neutron diffraction studies indicate that this compound has the orthorhombic CeNiSi2-type crystal structure (space group Cmcm). The magnetic ordering, based on the neutron diffraction data in low temperature, is described by two components: a collinear antiferromagnetic G-type and a cosine-wave modulated one. In the collinear G-type structure the Tb magnetic moment is equal to 3.81(5) µB and it is parallel to the c-axis. The modulated structure is described by the propagation vector k=(0.460(8), 0, 0.305(1)), the Tb magnetic moment equals 7.75(8) µB, lies in b-c and forms an angle 23(2)° with the c-axis. The collinear component decreases to zero at 22.6 K while the modulated one at 190.8 K.

New ternary MgCo2Ga5 and MgNi2Ga5 gallides

Zeitschrift für Kristallographie - Crystalline Materials

The crystal structure of new isostructural compounds MgCo2Ga5 and MgNi2Ga5 has been investigated ... more The crystal structure of new isostructural compounds MgCo2Ga5 and MgNi2Ga5 has been investigated using single-crystal X-ray diffraction. Both compounds represent a new type of structure: orthorhombic, space group Pnnm, oP16, with the following lattice parameters: a = 6.2700(2) Å, b = 6.6946(2) Å, c = 6.0789(2) Å (for MgCo2Ga5) and a = 6.2693(3) Å, b = 6.6968 Å, c = 6.0794 Å (for MgNi2Ga5). The MgCo2Ga5 and MgNi2Ga5 are closely related to the tetragonal structure of CoGa3 which crystallizes in the ht-IrIn3 type. The orthorhombic structures of MgCo2Ga5 and MgNi2Ga5 are derived from CoGa3 via a translationengleiche symmetry reduction of index 2. The symmetry reduction from P42/mnm to Pnnm causes that the 4c site splits into two sites 2c and 2d. The gallium atoms together with cobalt or nickel form 3D-nets with channels, in which magnesium atoms are inserted. The formation of these polyatomic nets is confirmed by distribution of electron localization function (ELF) and charges of atoms.

Safety issues in use of natural gas

Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa, 2015

Streszczenie. W XXI wieku gaz ziemny jest jednym z najbardziej znac ców energetycznych na dowiska... more Streszczenie. W XXI wieku gaz ziemny jest jednym z najbardziej znac ców energetycznych na dowiska. Zanieczyszczenia, które wydzielaj mniejsze ni w przypadku zmiennej wysokiej warto Celem pracy jest analiza systemów zabezpiecze ków z udziałem gazu ziemnego oraz zbadanie poziomu nej dotycz cej bezpiecze Słowa kluczowe: gaz ziemny, instalacja gazowa, systemy zabezpiecze SAFETY Summary. In the twenty resources in the world as well as extremely safe and environmentally inants that are released in the process of combusti energy sources, while maintaining a constant high c The aim of the study is to volving natural gas and to examine the level of knowled in use of natural gas.

Influence of information and communication technology security management in the implementation of ICT for educational purposes at high school : case study of Radom region

Security becomes more and more important in all aspects of our lives and Schools are aware that i... more Security becomes more and more important in all aspects of our lives and Schools are aware that it has become a management problem. In this paper we analyze the obstacles of ICT use for education purposes at school in the Radom region. Is it a lack of ICT security management systems or may be lack of Information and Com- munication Technology knowledge the reason why this important instrument is not fully implemented in the educational system in this region? To this and other questions we will give answer in this research based on OLAREX 1 survey results.

Structure and Magnetic Properties of Ternary R-Ge-SN Systems

Educational Model for Cross-Generational Collaboration

ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, 2021

The paper's considerations relate to an Erasmus+ project called Generation: Smart. Social Com... more The paper's considerations relate to an Erasmus+ project called Generation: Smart. Social Competences Transmedia Bridge To Cultivate A New Culture For Cross-Generational Collaboration. The consortium agreed that due to profound changes in the contemporary Network Societies, people of various generations have to collaborate. However, it is a complex issue due to the divergent life purposes of different aged people. Thus, the project's targeted group, i.e., educators who support adult learners, should be equipped with an educational model that constitutes a solution to this situation. The assumption was that such a model is to include social competences enabling the processes of cross-generational collaboration. Information technology transmedia blend is supposed to bridge the gap between generations. In the paper, we present an overlook of the research that focuses on developing such a framework model. The research features triangulation, which means the analysis of both quan...

Creating Intrapreneurship as an Area of Corporate Entrepreneurship

SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, 2020

The article focuses on the characteristics of intrapreneurship as an area of corporate entreprene... more The article focuses on the characteristics of intrapreneurship as an area of corporate entrepreneurship. Attention was paid to the essence and importance of intrapreneurship in the organization. Then, based on the analysis of activities supporting intrapreneurship undertaken in an international corporation of the banking sector and literature research on this subject, a model was developed to stimulate the creation of intrapreneurship within large organizations. The tools used in the model are divided into tools from the category of people management (soft) and tools related to working methods.

Susceptibility of the Rare Earth Ternary RNiSi2and RNiGe2Compounds

Acta Physica Polonica A, 1994

The ternary silicides and germanides RNiX 2 (R-rare earth, X = Si or Ge) with the orthorhombic Ce... more The ternary silicides and germanides RNiX 2 (R-rare earth, X = Si or Ge) with the orthorhombic CeNiSi 2-type structure are investigated by magnetometric measurements. CeNiSi 2 , CeNiGe2 and SmNiGe 2 have a nonmagnetic state in low temperatures. The compounds with R = Pr and Nd are ferromagnets while those containing R = Gd-Er are antiferromagnets. The de Gennes scaling of the Néel temperatures indicates a strong influence of the crystalline-electric field effects.

Magnetic Properties of TbFe0.25Ge2, TbSn0.4Ge1.4and NdSn0.6Ge1.775Compounds

Acta Physica Polonica A, 2012

The magnetic data of TbFe0.25Ge2, TbSn0.4Ge1.4 and NdSn0.6Ge1.775 compounds are reported. These c... more The magnetic data of TbFe0.25Ge2, TbSn0.4Ge1.4 and NdSn0.6Ge1.775 compounds are reported. These compounds crystallize in the orthorhombic crystal structures described by the space group Cmcm (No. 63) and they are antiferromagnets with the Néel temperatures equal to 19.5, 22 and 3.7 K, respectively.

The Role of the Internet in Self-Study

SOCIETY, INTEGRATION, EDUCATION. Proceedings of the International Scientific Conference, 2015

The concepts of teaching, learning and self-education are the most essential aspects in the proce... more The concepts of teaching, learning and self-education are the most essential aspects in the processes of preparing employees for knowledge economy as well as in the processes of developing and improving skills required not only at work, but also in personal life.The Internet constitutes an essential link in educationasa basic form of teaching and a supplementary element not only in the traditional model of instruction, but also in selfeducation. The following article presents questions concerning self-education and the Internet as a place and technique of self-education, as well as the concept of e-learning as a modern form of distance education.

Magnetic interaction in RTxX2 ternary compounds

MATERIALS SCIENCE-POLAND

ABSTRACT

Psycho-Educational Context of Supporting Seniors in Poland , Using Tools from the Edusenior Project

SOCIETY, INTEGRATION, EDUCATION. Proceedings of the International Scientific Conference, 2015

The purpose of the article was to capture the psycho-educational context of support for Polish se... more The purpose of the article was to capture the psycho-educational context of support for Polish seniors by institutions that have used the methods developed in the Edusenior project. The areas requiring seniors’ education and the scope of work carried out by the developing institutions, government, and NGOs initiatives to raise the quality of life for seniors have been elucidated in the following article. The products obtained from the international Edusenior project, in which the preliminary results were evaluated by experienced Polish reviewers, comply with the above requirements.

Analysis of Selected Areas of Educational Activity of Senior Citizens

SOCIETY, INTEGRATION, EDUCATION. Proceedings of the International Scientific Conference, 2015

The rhythm of development, similar to the rhythm of the changing seasons, is a necessity. We cann... more The rhythm of development, similar to the rhythm of the changing seasons, is a necessity. We cannot avoid old age or death. Just as Autumn may be the most beautiful season of the year, so the old age may be the best stage of life, in which one achieves worldly wisdom and tastes life, while one's life experiences give the sense of solid accomplishment. Nevertheless, there are Autumns which are rainy and fruitless, and so there is old age which is barren, painful, and perhaps even tragic." Antoni Kępiński, Rytm życia (translated by "Gruca-Wolski" s.c.

Magnetic and Electronic Properties of Selected Rare-Earth Chromium Germanides Compounds

Acta Physica Polonica A, 2015

The ternary rare-earth compounds exhibit interesting physical and structural properties. These st... more The ternary rare-earth compounds exhibit interesting physical and structural properties. These structures changing composition and stoichiometry change drastically their magnetic properties. Some of them, based on chromium germanides were studied experimentally concerning their magnetic properties and up to our knowledge they were never studied theoretically explaining nature of their magnetic behaviour. In the presented work the nature and mechanism of the magnetic and electronic properties of rare-earth chromium germanides is presented. The magnetic and electronic properties of RCrGe2 and RCr0.3Ge2 (R = Tb, Dy, Ho or Er) were investigated theoretically applying plane-wave density functional theory/PerdewBurkeErnzerhof methodology. The computational investigations were performed for the stoichiometric and nonstoichiometric crystal structure with the space group Cmcm. The stoichiometry of the rare-earth chromium germanides compounds has signicant eect on the magnetic properties of the investigated material. The theoretical predictions are compared to the experimentally obtained results.

Magnetic Structures of LnNixSn2 (Ln: Tb, Ho) Compounds

ChemInform, 2004

Magnetic properties Magnetic properties D 9000 Magnetic Structures of LnNi x Sn 2 (Ln: Tb, Ho) Co... more Magnetic properties Magnetic properties D 9000 Magnetic Structures of LnNi x Sn 2 (Ln: Tb, Ho) Compounds.-As revealed by powder neutron diffraction, the title compounds TbNi 0.26 Sn 2 and HoNi 0.16 Sn 2 crystallize in the orthorhombic CeNiSi2-type structure. Magnetic and neutron diffraction measurements show that both compounds are antiferromagnets with Neel temperatures of 17.4 K (Ln: Tb) and 6.6 K (Ln: Ho). The magnetic structures of the title compounds are compared with those observed for LnNiSn 2 and the isostructural silicides and germanides.

Magnetic phase transitions in Tb0.4Nd0.6NiGe2 compound

Physica B: Condensed Matter, 2004

ABSTRACT

$Research paper thumbnail of Neutron diffraction studies of RSn1+xGe1−x (R=Tb–Er) compounds$

Neutron diffraction studies of RSn1+xGe1−x (R=Tb–Er) compounds

Journal of Solid State Chemistry, 2011

The magnetic structures of RSn 1 þ x Ge 1 À x (R ¼ Tb, Dy, Ho and Er, x E 0.1) compounds have bee... more The magnetic structures of RSn 1 þ x Ge 1 À x (R ¼ Tb, Dy, Ho and Er, x E 0.1) compounds have been determined by neutron diffraction studies on polycrystalline samples. The data recorded in a paramagnetic state confirmed the orthorhombic crystal structure described by the space group Cmcm. These compounds are antiferromagnets at low temperatures. The magnetic ordering in TbSn 1.12 Ge 0.88 is sine-modulated described by the propagation vector k ¼ (0.4257(2), 0, 0.5880(3)). Tb magnetic moment equals 9.0(1) m B at 1.62 K. It lies in the b-c plane and form an angle y¼17.4(2)1 with the c-axis. This structure is stable up to the N eel temperature equal to 31 K. The magnetic structures of RSn 1 þ x Ge 1 À x , where R are Dy, Ho and Er at low temperatures are described by the propagation vector k ¼ (1/2, 1/2, 0) with the sequence (þþÀ þ) of magnetic moments in the crystal unit cell. In DySn 1.09 Ge 0.91 and HoSn 1.1 Ge 0.9 magnetic moments equal 7.25(15) and 8.60(6) m B at 1.55 K, respectively. The moments are parallel to the c-axis. For Ho-compound this ordering is stable up to T N ¼ 10.7 K. For ErSn 1.08 Ge 0.92 , the Er magnetic moment equals 7.76(7) m B at T¼ 1.5 K and it is parallel to the b-axis. At T t ¼ 3.5 K it tunes into the modulated structure described by the k ¼(0.496(1), 0.446(4), 0). With the increase of temperature there is a slow decrease of k x component and a quick decrease of k y component. The Er magnetic moment is parallel to the b-axis up to 3.9 K while at 4 K and above it lies in the b-c plane and form an angle 48(3)1 with the c-axis. In compounds with R¼ Tb, Ho and Er the magnetostriction effect at the N eel temperature is observed.

New sources and instrumentation for neutron science

Journal of Physics: Conference Series, 2011

ABSTRACT

Structural and magnetic properties of RMnxGe2 (R = Nd,Sm,Gd,Tb,Dy,Ho,Er) intermetallic compounds

Journal of Magnetism and Magnetic Materials, 1994

Magnetic susceptibility and neutron diffraction data show that NdMn0.42Ge2, TbMn0.33Ge2 and HoMn0... more Magnetic susceptibility and neutron diffraction data show that NdMn0.42Ge2, TbMn0.33Ge2 and HoMn0.33Ge2 which exhibit defected CeNiSi2 type crystal structure, order antiferromagnetically (G-mode ordering) below 34 +/- 2, 26 +/- 2 and 7 +/- 2 K with ordered magnetic moments on R3+ ions amounting to 1.55(15), 7.0(1) and 7.3(1) muB respectively. Magnetic susceptibility vs. temperature curves give Néel points at 30

Magnetic properties of RNiSi2 and RNiGe2 compounds

Journal of Magnetism and Magnetic Materials, 1994

ABSTRACT

Crystal and magnetic structure of TbFe0.25Ge2 compound

Journal of Magnetism and Magnetic Materials, 2013

ABSTRACT The crystal and magnetic structure of polycrystalline TbFe0.25Ge2 sample have been deter... more ABSTRACT The crystal and magnetic structure of polycrystalline TbFe0.25Ge2 sample have been determined. X-ray and neutron diffraction studies indicate that this compound has the orthorhombic CeNiSi2-type crystal structure (space group Cmcm). The magnetic ordering, based on the neutron diffraction data in low temperature, is described by two components: a collinear antiferromagnetic G-type and a cosine-wave modulated one. In the collinear G-type structure the Tb magnetic moment is equal to 3.81(5) µB and it is parallel to the c-axis. The modulated structure is described by the propagation vector k=(0.460(8), 0, 0.305(1)), the Tb magnetic moment equals 7.75(8) µB, lies in b-c and forms an angle 23(2)° with the c-axis. The collinear component decreases to zero at 22.6 K while the modulated one at 190.8 K.