A.M. Awasthi
Also known as: Anand M. Awasthi
UGC DAE Consortium for Scientific Research, University Grants Commission-Department of Atomic Energy Consortium for Scientific Research, University of California, Los Angeles, University of Pittsburgh
Research areas: Materials Science · Electronic, Optical and Magnetic Materials · Magnetic and transport properties of perovskites and related materials · Multiferroics and related materials · Solid-state spectroscopy and crystallography
0000-0002-7345-2038
About
Ph.D. (1991) - Univ. California, Los Angeles.
Research Activities - Examined network (rigidity) evolution in binary chalcogenide glass GexSe1-x via structural (XRD), thermal (DSC, low-T Cp), and vibrational (Raman) studies; registered two (2nd- and 1st-order) compositional transitions en-route to bulk-rigidity. Multiferroicity in hexagonal-YMnO3, investigated via Fe-substitution of Mn, was found to cause isostructural changes with indications of linear magneto-electric effect, and disorder-driven spin-reorientation, hand-in-hand with the qualitative change (sign-reversal) of the magneto-electric coupling. Colossal dielectric constant (CDC) of CaCu3Ti4O12, exhibiting many-body effects and strange kinetics, was traced to Ca-/Cu-rich antisite-disordered fractal sub-structure, with electrical inhomogeneity. A novel quantum paraelectric glass (QPG) state is identified in SrCu3Ti4O12 near its AFM-T_N. A field-induced phase transition in KDP crystal is found, transforming its domain wall matter from single-particle pinned / strong-glassformer to collective / superfragile-glassformer character. ME-behaviour in La0.53Ca0.47MnO3 was linked with ferro/para-magnetic phase coexistence. Disorder-broadened spin-state crossover in La0.95Ca0.05CoO3 collaterally vitrifies the allied dipole-clusters; magnetic devitrification provided new route to ME. investigated harmonic-ME in multiglasses (disordered, Type-III Magneto-electrics). Ex-Professor Emeritus (retired as Scientist- H, July 2019) in UGC-DAE Consortium for Scientific Research, Indore (India).
Employment
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UGC DAE Consortium for Scientific Research Professor Emeritus2019 - 2021
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University Grants Commission-Department of Atomic Energy Consortium for Scientific Research Scientist- H1993 - 2019
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Ludwig Boltzmann Institut für Festkorperphysik Post-Doctoral Fellow1992 - 1993
Education
- 1986 - 1991
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University of California Masters1983 - 1985
- 1982 - 1983
- 1978 - 1980
Projects & Funding
Projects & funding information is unavailable.
Publications (150)
- Interplay of spin and orbital ordering in a frustrated spinel chromite Save
- Effect of magnetic phase coexistence on spin-phonon coupling and magnetoelectric effect in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3 Save
- Magneto-dielectric signature of Gd3+-substituted PbMg1/3Nb2/3O3 ceramics Save
- Novel anomalies of soft quasi-localized glassy mode in the vicinity of boson peak frequency Save
- Characterization and ion transport studies through impedance spectroscopy on (1-x)Pb(NO3)2:xAl2O3 composite solid electrolytes (vol 1, pg 175, 2018) Save
- Effect of reentrant spinglass-like states on Schottky Anomaly and exchange bias in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3 Save
- Structural transition and thermo-physical study of quaternary (Se80Te20)(94-x)Ge6Pbx (0 <= x <= 12) alloys Save
- Effect of dopant concentration and annealing temperature on electric and magnetic properties of lanthanum substituted CoFe2O4 nanoparticles for potential use in 5G wireless communication systems Save
- On the crystallization kinetics of multicomponent nano-chalcogenide Se79-x Te15In6Pbx (x = 0, 1, 2, 4, 6, 8 and 10) alloys Save
- Harmonic magneto-dielectric study in doped-, double-, and layered-perovskites Save
- Correlative exploration of structural and dielectric properties with Er2O3 addition in BaO–ZnO–LiF–B2O3 glasses Save
- Interplay of spin, lattice, vibration, and charge degrees of freedom: Magneto‐dielectricity in Ca3Mn2O7 Save
- Crystallite-size Dependent Harmonic Magneto-electricity in SmFeO3 Save
- Structural Relaxation and Electrical Transport in NASICON Reinforced Na+ Ion Solid Polymer Electrolytes Save
- Magneto-dielectric coupling and non-ergodic electrical behaviour in hexagonal Sr0.6Ba0.4MnO3 via local strain driven magnetic ordering Save
- Uncompensated-spins Induced Weak Ferromagnetism in Ca3Mn2O7: Magnetoconductive and dual Magneto-capacitive Effects Save
- Hexagonal Sr0.6Ba0.4MnO3: Spin and dipole coupling via local structure Save
- Spin-lattice coupling mediated giant magnetodielectricity across the spin reorientation in Ca2FeCoO5 Save
- Harmonic Magneto-dielectric Study in Doped Perovskites, and Double Perovskite Save
- Interplay of Spin, Lattice, and Charge Degrees of Freedom in Ca3Mn2O7 Save