A
Ashok Kumar
Researcher at Council of Scientific and Industrial Research
Publications - 173
Citations - 4289
Ashok Kumar is an academic researcher from Council of Scientific and Industrial Research. The author has contributed to research in topics: Ferroelectricity & Dielectric. The author has an hindex of 31, co-authored 173 publications receiving 3534 citations. Previous affiliations of Ashok Kumar include National Physical Laboratory & University of Puerto Rico, Río Piedras.
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Magnetic control of large room-temperature polarization.
TL;DR: This long-sought effect of room-temperature magnetic switching of large electric polarizations as 'the Holy Grail' of magnetoelectricity is reported, obtained using a new physical process of coupling between magnetic and ferroelectric nanoregions.
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Impedance spectroscopy analysis of Ba0.7Sr03TiO3/La0.7Sr0.3MnO3 heterostructure
TL;DR: In this paper, the effect of grains and grain boundaries in a heterostructure constituted with ferromagnetic La 0.7Sr0.3MnO3 (LSMO) and ferroelectric Ba 0.3TiO3 layers grown by pulsed laser deposition technique on (1?0?0) oriented MgO substrate was studied.
Posted Content
Magnetic control of large room-temperature polarization
TL;DR: In this article, a new physical process of coupling between magnetic and ferroelectric relaxor nano-regions was reported, which gave both a room-temperature, single-phase, multiferroic magnetoelectric, PbZr0.46Ti0.34Fe0.13W0.07O3, with polarization, loss ( 100?s), and it couples strongly the polarization relaxation and spin relaxations.
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Correlation of dielectric, electrical and magnetic properties near the magnetic phase transition temperature of cobalt zinc ferrite
Dhiren K. Pradhan,Shalini Kumari,Venkata Sreenivas Puli,Proloy T. Das,Dillip K. Pradhan,Ashok Kumar,James F. Scott,Ram S. Katiyar +7 more
TL;DR: CZFO exhibits low loss tangent, a high dielectric constant, large magnetization with soft magnetic behavior and magnetodielectric coupling above room temperature, elucidating the possible potential candidates for multiferroic composite structures as well as for multifunctional and spintronics device applications.
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Ferroelectric polymer-ceramic composite thick films for energy storage applications
TL;DR: In this paper, the authors have successfully fabricated large area free standing polyvinylidene fluoride -Pb(Zr0.52Ti0.48)O3 (PVDF-PZT) ferroelectric polymer-ceramic composite with an average diameter (d) ∼ 0.1 meter and thickness (t) ∼ 50 μm.