114 citations · 567 across the 24 of their papers we have counts for
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Phase evolution and enhanced room temperature piezoelectric properties response of lead-free Ru doped BaTiO3 ceramic
Kumar Brajesh, Sudhir Ranjan, Ashish Garg
Recent years have witnessed considerable work on the development of lead-free piezoelectric ceramic materials and their structure-property correlations. The development of piezo re…
Room Temperature Structural, Magnetic and Dielectric Characteristics of La Doped CuO Bulk Multiferroic
Kumar Brajesh, Sudhir Ranjan, Rajeev Gupta +2
In this manuscript, we report room temperature structural, microstructural, optical, dielectric, and magnetic properties of CuO and Cu0.995La0.005 ceramics, synthesized by solid-st…
Low temperature magnetic and dielectric properties correlation in Fe-doped copper (ii) oxide ceramics for potential device application
Kumar Brajesh, Ritamay Bhunia, Shashikant Gupta +3
The bulk samples of CuO and Fe-doped CuO were synthesized by ceramics methods. Structural and compositional analyses were performed by using X-ray diffraction, SEM, and EDAX. Throu…
Evidence for Incipient Ferroelectricity in YCrO3
Ashish Kumar Mall, Barnita Paul, Ashish Garg +1
Cubic structure is one of the most commonly found structures for oxides at high temperature. As the temperature is lowered only a handful of these oxides exhibit ferroelectricity w…
Room temperature multiferroism in polycrystalline thin films of gallium ferrite
Monali Mishra, Amritendu Roy, Ashish Garg +2
Sol-gel deposited (010) textured polycrystalline thin films of gallium ferrite (GaFeO3 or GFO) on n-Si(100) and Pt/Si(111) substrates are characterized for room temperature multife…
Ferroelectric polarization switching with a remarkably high activation-energy in orthorhombic GaFeO3 thin films
Seungwoo Song, Hyun Myung Jang, Nam-Suk Lee +5
Orthorhombic GaFeO3 (o-GFO) with the polar Pna21 space group is a prominent ferrite by virtue of its piezoelectricity and ferrimagnetism, coupled with magneto-electric effects. Her…
Optical Anisotropy in Bismuth Titanate: An Experimental and Theoretical Study
Amritendu Roy, Rajendra Prasad, Sushil Auluck +1
We report experimental and theoretical investigation of anisotropy in optical properties and their origin in the ferroelectric and paraelectric phases of bismuth titanate. Room tem…
Room Temperature Nanoscale Ferroelectricity in Magnetoelectric GaFeO3 Epitaxial Thin Films
Somdutta Mukherjee, Amritendu Roy, Sushil Auluck +3
We demonstrate room temperature ferroelectricity in the epitaxial thin films of magnetoelectric GaFeO3. Piezo-force measurements show a 180o phase shift of piezoresponse upon switc…
Engineering Polarization Rotation in Ferroelectric Bismuth Titanate
Amritendu Roy, Rajendra Prasad, Sushil Auluck +1
Here, we report a combined experimental-theoretical study showing that collective application of rare earth doping on A-site and epitaxial strain to ferroelectric bismuth titanate…
Effect of Site-disorder, Off-stoichiometry and Epitaxial Strain on the Optical Properties of Magnetoelectric Gallium Ferrite
Amritendu Roy, Somdutta Mukherjee, Surajit Sarkar +4
We present a combined experimental-theoretical study demonstrating the role of site disorder, off-stoichiometry and strain on the optical behavior of magnetoelectric gallium ferrit…
Spin Glass-like Phase below ~ 210 K in Magnetoelectric Gallium Ferrite
Somdutta Mukherjee, Ashish Garg, Rajeev Gupta
In this letter we show the presence of a spin-glass like phase in single crystals of magnetoelectric gallium ferrite (GaFeO3) below ~210 K via temperature dependent ac and dc magne…
First Principle Study of Magnetism and Magneto-structural Coupling in Gallium Ferrite
Amritendu Roy, Rajendra Prasad, Sushil Auluck +1
We report a first-principles study of the magnetic properties, site disorder and magneto-structural coupling in multiferroic gallium ferrite (GFO) using local spin density approxim…
Composition Dependence of Structural Parameters and Properties of Gallium Ferrite
Somdutta Mukherjee, Vishal Ranjan, Rajeev Gupta +1
We show the effect of composition on structural and magnetic characteristics of pure phase polycrystalline Ga<2-x>Fe<x>O<3> (GFO) for compositions between 0.8 <= x <= 1.3. X-ray an…
Probing Magnetoelastic Coupling and Structural Changes in Magnetoelectric Gallium Ferrite
Somdutta Mukherjee, Rajeev Gupta, Ashish Garg
Temperature dependent X-ray diffraction and Raman spectroscopic studies were carried out on the flux grown single crystals of gallium ferrite with Ga:Fe ratio of 0.9:1.1. Site occu…
Electronic Structures, Born Effective Charges and Spontaneous Polarization in Magnetoelectric Gallium Ferrite
Amritendu Roy, Somdutta Mukherjee, Rajeev Gupta +3
We present a theoretical study of the structure-property correlation in gallium ferrite, based on the first principles calculations followed by a subsequent comparison with the exp…
Absence of Morphotropic Phase Boundary Effects in BiFeO3-PbTiO3 Thin Films Grown via a Chemical Multilayer Deposition Method
Ashish Garg, Shashaank Gupta, Shuvrajyoti Bhattacharjee +4
Here, we report the unusual behaviour shown by the (BiFeO3)1-x-(PbTiO3)x (BF-xPT) films prepared using a multilayer deposition approach by chemical solution deposition method. Thin…
Structural Changes and Ferroelectric Properties of BiFeO<sub>3</sub>-PbTiO<sub>3</sub> Thin Films Grown via a Chemical Multilayer Deposition Method
Shashaank Gupta, Ashish Garg, Dinesh Chandra Agrawal +2
Thin films of (1-x)BiFeO<sub>3</sub>-xPbTiO<sub>3</sub> (BF-xPT) with x ~ 0.60 were fabricated on Pt/Si substrates by chemical solution deposition of precursor BF and PT layers alt…
First-Principles Calculation of Born Effective Charges and Spontaneous Polarization of Ferroelectric Bismuth Titanate
Amritendu Roy, Rajendra Prasad, Sushil Auluck +1
In this study, we present the results of our first-principles calculations of the band structure, density of states and the Born effective charge tensors for the ferroelectric (gro…
Existence of Large Room Temperature Ferroelectricity in Chemical Solution Grown PbTiO3 Buffered (BiFeO3)1-x-(PbTiO3)x Films on Pt/Si Substrates
Ashish Garg, Soumya Kar, Dinesh Chandra Agrawal +2
Here, we report the existence of large remnant polarization and dielectric constant in PbTiO3 buffered polycrystalline (BiFeO_3)_{1-x} (PbTiO_3)_x thin films of composition x = 0.2…
Phase Stability in Ferroelectric Bismuth Titanate: A First Principles Study
Anurag Shrinagar, Ashish Garg, Rajendra Prasad
Experimental data on the structure of ferroelectric oxide Bismuth Titanate suggests two different kinds of structures i.e. orthorhombic and monoclinic. We have performed density fu…