Magnetic thin films
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Recent papers in Magnetic thin films
We report results on epitaxial magnetite (Fe 3 O 4 ) thin films grown by electron beam ablation on (1 0 0) MgAl 2 O 4 substrates. At 120 K magnetite undergoes a structural and electronic transition, the so-called Verwey transition, at... more
Thermoelectric Power studies of Ni-Mg ferrites having chemical formula Ni 1-x Mg x FeO 4 (x = 0.2, 0.4, 0.6 and 0.8) were investigated from room temperature to well beyond Curie temperature by the differential method. The Seebeck... more
Due to advancements in nanomagnetism and latest nanomagnetic materials and devices, a new potential field has been opened up for research and applications which was not possible before. We herein propose a new research field and... more
CoP multilayers have been electrodeposited on Cu wires. By applying external torsion, it is possible to indnce helical anisotropies that become permanent when the torsion is removed. These anisotropies and consequently the magnetization... more
Focused ion beam induced structural modifications in thin magnetic films J. Appl. Phys. 112, 033901 (2012) Magnetic field alignment of template released ferromagnetic nanowires J. Appl. Phys. 112, 013910 (2012) Periodic arrays of magnetic... more
Magnetite nanoparticles doped with Na + ions are prepared by co-precipitation method and characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), Vibrating sample magnetometer (VSM), Dynamic light scattering... more
Lanthanum halide nanoparticle scintillators for nuclear radiation detection J. Appl. Phys. 113, 064303 (2013) Molecular dynamics simulations of evaporation-induced nanoparticle assembly J. Chem. Phys. 138, 064701 (2013) Nanoparticles... more
Nickel nanoparticles arrays, growth into hydro-genated amorphous carbon, were prepared by means of RF-plasma enhanced chemical vapor deposition and RF-sputtering co-deposition from acetylene and a nickel target. The resulting... more
We introduce a facile approach to transfer thin films and other mechanically sensitive TEM samples inside a FIB with minimal introduction of stress and bending. The method is making use of a pre-synthetized flexible free-standing Ag... more
A series of Fe x Ni 100 À x (2rxr100) thin films with thicknesses between 110 and 150 nm were evaporated on Si(100) substrates. The structural, magnetic and electrical properties of the films were studied by means of X-ray diffraction... more
We have studied the structure,the surface morphology, the magnetic domains and the magnetization of ferromagnetic BaFeO3-δ (BFO) thin films deposited on single-crystal MgO(001) substrate.The BFO film is ferromagnetic-insulating at room... more
We present a study of the magnetic properties and magnetization processes in hard Co-Pt ͑Pt ϳ 20 at. % ͒ films. Co-rich Co-Pt films, with thickness t ranging from 5 nm up to 2 m, were prepared by electrodeposition on ͑0001͒-oriented Ru... more
Calcium phosphate (CaP) compounds like hydroxyapatite and tricalcium phosphates are considered to be very important biomaterials. This study used RF-magnetron sputtering (RF-MS) to deposit CaP onto 316L SS. Due to the complex nature of... more
We have simulated the magnetic relaxation and the formation of magnetic domains in very thin films with strong anisotropy perpendicular to the film plane. We have used Monte Carlo simulation based on a two-dimensional classical Ising... more
The in#uence of long-range dipole}dipole interaction on the coercivity of an array of glass-coated CuNiCo microwires is investigated by means of magnetic hysteresis measurements and Monte Carlo simulations. The microwires exhibit a... more
Lanthanum halide nanoparticle scintillators for nuclear radiation detection J. Appl. Phys. 113, 064303 (2013) Molecular dynamics simulations of evaporation-induced nanoparticle assembly J. Chem. Phys. 138, 064701 (2013) Nanoparticles... more
We have studied the thermal stability of L1 0 FePt thin films and Fe-FePt exchange-spring (ES) bilayers grown on (1 0 0) MgO by RF sputtering. The viscosity curves showed both for FePt films and bilayers a clear logarithmic decay of... more
We have studied the magnetic domain patterns and the thermodynamical properties of magnetic thin films with perpendicular anisotropy. The temperature dependence of the domain pattern, specific heat, susceptibility, and spatial correlation... more
Iron oxides are material of interest because of their use in spintronic devices including Magnetic Tunnel Junctions (MTJ) and Random Access Memories (RAM). Among the various phases of iron oxide, Fe 2 O 3 is the most stable form which... more
A numerical model has been developed for simulating magnetic domain configurations, remanence, and viscosity curves in systems with strong perpendicular anisotropy and strong disorder, starting from internal switching field distributions... more
TiO2 thin films were deposited on unheated and heated glass substrates at an elevated sputtering pressure of 3 Pa by radio frequency (RF) reactive magnetron sputtering. TiO2 films deposited at room temperature were annealed in air for 1 h... more
The nanostructures and magnetic properties of Ge 1 À x Mn x thin films grown on Si substrates by molecular beam epitaxy, with different nominal Mn concentrations (1 À 4%) and different growth temperatures, have been systematically... more
We present a magnetic characterisation of MnAs films grown by MOVPE on semiconductor substrates, for comparing the effect of thickness and substrate on their magnetic and magneto-thermal properties, with particular focus on the nature of... more
We have used resonant x-ray diffraction to develop a detailed description of antiferromagnetic ordering in epitaxial superlattices based on two-unit-cell thick layers of the strongly correlated metal LaNiO 3. We also report reference... more
Patterned magnetic thin films have for the first time been used to orient and retain micron-sized III-V elements on silicon substrates during fluidic hybrid assembly. Modeling of the forces between Ni thin films patterned on one surface... more
We analyze here the magneto-optical measurements of hybrid materials containing metallic and oxide ferromagnetic phases. We show that the magnetization curves obtained with this technique can be fairly different to those obtained with... more
We present a study of the magnetic properties and magnetization processes in hard Co-Pt ͑Pt ϳ 20 at. % ͒ films. Co-rich Co-Pt films, with thickness t ranging from 5 nm up to 2 m, were prepared by electrodeposition on ͑0001͒-oriented Ru... more
A numerical model has been developed for simulating magnetic domain configurations, remanence, and viscosity curves in systems with strong perpendicular anisotropy and strong disorder, starting from internal switching field distributions... more
ABSTRACT Perovskite BaFeO3−δ (BFO) thin films (∼250 nm), deposited on MgO (001) singlecrystal wafers, were irradiated by ion beams of: i) 200MeV Ag+15 (Series-1) and ii) 100MeV O+7 (Series-2). These films are investigated for structural,... more
The magnetic susceptibility of Fe–Al off-normal pulsed laser deposited thin films was measured at ultra high frequencies, UHF. Different Fe(1-x)–Al(x) films from pure Fe to x = 0.2 Al were prepared. The films were ≈ 40 nm thick and... more
The magnetic properties and the magnetization process of electrodeposited thick films of Co-rich CoPt alloys are studied with particular emphasis on the effects of growth rate, controlled by varying the plating current density, and of... more
A numerical model has been developed for simulating magnetic domain configurations, remanence, and viscosity curves in systems with strong perpendicular anisotropy and strong disorder, starting from internal switching field distributions... more