Temperature-dependent dynamic ferroelectric hysteresis of semiconductor–relaxor ferroelectric (0–... more Temperature-dependent dynamic ferroelectric hysteresis of semiconductor–relaxor ferroelectric (0–3) type composite {0.30(ZnO)–0.70[(Bi0.5Na0.5)0.94Ba0.06TiO3 (BNBTO)]} has been investigated using polarization–electric field (P–E) loops, current density–electric field (J–E) curves, and temperature-dependent dielectric permittivity. It is well known that the polarization reversal mechanism can be explained by the concept of ferroelectric domain switching kinetics, which depends strongly on the temperature. The present work ascribes the role of polar nanoregion induced thermal depolarization field on the temperature-dependent ferroelectric hysteresis loop along with polarization reversal mechanism. The present composite exhibits unique ferroelectric switching behavior above the thermal depolarization temperature (∼100 °C), which is observed in P–E and J–E loops. The depolarization field-induced pinched P–E loops of a BNBTO solid solution above Td (∼100 °C) have been significantly overc...
The spectrums of properties exhibited by ferroelectric materials are dielectric, ferroelectric, p... more The spectrums of properties exhibited by ferroelectric materials are dielectric, ferroelectric, piezoelectric and pyroelectric effect. This is the makes these materials to have a wide range of useful application. Infrared detectors are used pyroelectric effect of ferroelectric materials. It is used in nonvolatile memories due to have ferroelectric hysteresis. Its piezoelectric properties make them useful for actuator, radio frequency filter, sensor, and transducer. Ferroelectric capacitors are used, their good dielectric behavior. According to the necessity of the system they are available in different form such as single crystals, ceramics, thin film, and polymer, composite. The diversity of properties ferroelectric materials always attracted the attention of engineers and researchers. Size reduction of this material from micro to nanoscale established an enormous consideration to develop nanotechnology. Its vast use of different filed imposed the in detail research in adding to th...
The sol gel technique was used to prepare Pb1-xNdx Zr0.52Ti0.48O3 with x = 0.02, 0.04, 0.06 and 0... more The sol gel technique was used to prepare Pb1-xNdx Zr0.52Ti0.48O3 with x = 0.02, 0.04, 0.06 and 0.10 samples. Room temperature Raman spectra of all the sample were recorded in the range of wave number 30-1000 cm−1. It suggests that the increase in contribution of tetragonal crystallographic phase with the increase in Nd concentration in the sample. FTIR study shows the presence of characteristic bending and streching vibrations of perovskite (ABO3) structure. Ferroelectric and piezoelectric properties were enhanced by the Nd substitution at Pb site of PbZr0.52Ti0.48O3.
Lead iron niobate (PFN) is a promising type-I multiferroic material. It is recognized for its use... more Lead iron niobate (PFN) is a promising type-I multiferroic material. It is recognized for its use in integrated magnetoelectric energy conversion. The preparation of the single crystal symmetry phase of PFN is difficult, and its magnetic and ferroelectric properties are still under study. PFN with different iron concentrations, i.e., PbNb 1Àx Fe x O 3 with x = 0.1, 0.2, 0.3, 0.4, and 0.5, have been prepared by the solid-state method, and its physical properties have been explored. X-ray diffraction (XRD) pattern analysis reveals the crystallization of the materials in the perovskite structure. No pyrochlore phases have been observed within the XRD detection limit. The observed XRD peaks correspond to the monoclinic structure with the Cm space group. Raman analysis shows lattice strain in the samples. The magnetization increases with the increase in Fe content in the sample. Maximum magnetization has been observed for 50 mol.% of Fe in PFN. Arrott plot analysis shows the materials to be antiferromagnetic. Remnant electric polarization and coercivity of PFN increase with the increase of iron concentration in the sample.
Temperature-dependent dynamic ferroelectric hysteresis of semiconductor–relaxor ferroelectric (0–... more Temperature-dependent dynamic ferroelectric hysteresis of semiconductor–relaxor ferroelectric (0–3) type composite {0.30(ZnO)–0.70[(Bi0.5Na0.5)0.94Ba0.06TiO3 (BNBTO)]} has been investigated using polarization–electric field (P–E) loops, current density–electric field (J–E) curves, and temperature-dependent dielectric permittivity. It is well known that the polarization reversal mechanism can be explained by the concept of ferroelectric domain switching kinetics, which depends strongly on the temperature. The present work ascribes the role of polar nanoregion induced thermal depolarization field on the temperature-dependent ferroelectric hysteresis loop along with polarization reversal mechanism. The present composite exhibits unique ferroelectric switching behavior above the thermal depolarization temperature (∼100 °C), which is observed in P–E and J–E loops. The depolarization field-induced pinched P–E loops of a BNBTO solid solution above Td (∼100 °C) have been significantly overc...
The spectrums of properties exhibited by ferroelectric materials are dielectric, ferroelectric, p... more The spectrums of properties exhibited by ferroelectric materials are dielectric, ferroelectric, piezoelectric and pyroelectric effect. This is the makes these materials to have a wide range of useful application. Infrared detectors are used pyroelectric effect of ferroelectric materials. It is used in nonvolatile memories due to have ferroelectric hysteresis. Its piezoelectric properties make them useful for actuator, radio frequency filter, sensor, and transducer. Ferroelectric capacitors are used, their good dielectric behavior. According to the necessity of the system they are available in different form such as single crystals, ceramics, thin film, and polymer, composite. The diversity of properties ferroelectric materials always attracted the attention of engineers and researchers. Size reduction of this material from micro to nanoscale established an enormous consideration to develop nanotechnology. Its vast use of different filed imposed the in detail research in adding to th...
The sol gel technique was used to prepare Pb1-xNdx Zr0.52Ti0.48O3 with x = 0.02, 0.04, 0.06 and 0... more The sol gel technique was used to prepare Pb1-xNdx Zr0.52Ti0.48O3 with x = 0.02, 0.04, 0.06 and 0.10 samples. Room temperature Raman spectra of all the sample were recorded in the range of wave number 30-1000 cm−1. It suggests that the increase in contribution of tetragonal crystallographic phase with the increase in Nd concentration in the sample. FTIR study shows the presence of characteristic bending and streching vibrations of perovskite (ABO3) structure. Ferroelectric and piezoelectric properties were enhanced by the Nd substitution at Pb site of PbZr0.52Ti0.48O3.
Lead iron niobate (PFN) is a promising type-I multiferroic material. It is recognized for its use... more Lead iron niobate (PFN) is a promising type-I multiferroic material. It is recognized for its use in integrated magnetoelectric energy conversion. The preparation of the single crystal symmetry phase of PFN is difficult, and its magnetic and ferroelectric properties are still under study. PFN with different iron concentrations, i.e., PbNb 1Àx Fe x O 3 with x = 0.1, 0.2, 0.3, 0.4, and 0.5, have been prepared by the solid-state method, and its physical properties have been explored. X-ray diffraction (XRD) pattern analysis reveals the crystallization of the materials in the perovskite structure. No pyrochlore phases have been observed within the XRD detection limit. The observed XRD peaks correspond to the monoclinic structure with the Cm space group. Raman analysis shows lattice strain in the samples. The magnetization increases with the increase in Fe content in the sample. Maximum magnetization has been observed for 50 mol.% of Fe in PFN. Arrott plot analysis shows the materials to be antiferromagnetic. Remnant electric polarization and coercivity of PFN increase with the increase of iron concentration in the sample.
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Papers by Paramjit Kour