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.
Papers
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Phonon anomalies and phonon-spin coupling in oriented PbFe 0.5 Nb 0.5 O 3 thin films
TL;DR: In this article, Raman data on both single-crystal and thin-film samples of the multiferroic PbFe (PFN) relaxor is presented. And the authors show that the number and selection rules of Raman lines are compatible with a face-centered-cubic structure.
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Growth of ZnO nanostructures on metallic and semiconducting substrates by pulsed laser deposition technique
TL;DR: In this paper, the island growth mechanism was used to explain the growth of ZnO nanostructures on metallic and semiconducting substrates by the pulsed laser deposition technique.
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Structural transformations and physical properties of (1 - x) Na0.5Bi0.5TiO3 - x BaTiO3 solid solutions near a morphotropic phase boundary.
Hari Sankar Mohanty,Tapabrata Dam,Hitesh Borkar,Dhiren K. Pradhan,K. K. Mishra,Ashok Kumar,Balaram Sahoo,Pawan K. Kulriya,Claudio Cazorla,James F. Scott,Dillip K. Pradhan +10 more
TL;DR: First-principles calculations based on density functional theory confirm a structural transition from a rhombohedral to a tetragonal phase under increasing x, and an anomalous enhancement of remnant polarization was observed in the prepared solid solution.
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Transition metal modified bulk BiFeO3 with improved magnetization and linear magneto-electric coupling
TL;DR: In this paper, the improved magnetic and observed linear magneto-electric coupling in Co and Sm co-doped BiFeO 3 ceramics synthesized by sol-gel process at low temperature ∼600°C.
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A marine sponge alkaloid derivative 4-chloro fascaplysin inhibits tumor growth and VEGF mediated angiogenesis by disrupting PI3K/Akt/mTOR signaling cascade.
Sonia Sharma,Santosh Kumar Guru,Sudhakar Manda,Ashok Kumar,Mubashir J. Mintoo,Venna Deva Prasad,Parduman R. Sharma,Dilip M. Mondhe,Sandip B. Bharate,Shashi Bhushan,Shashi Bhushan +10 more
TL;DR: The molecular mechanism of a marine sponge alkaloid derivative 4-chloro fascapysin (4-CF) for its anticancer and antiangiogenesis potential is reported for the first time.