164 citations · 365 across the 13 of their papers we have counts for
13 papers
Phase separated behavior in Yttrium doped CaMnO3
Neetika Sharma, A. Das, C. L. Prajapat +2
The effect of electron doping on the structural, transport, and magnetic properties of Mn (IV) - rich Ca1-xYxMnO3 (x < 0.2) samples have been investigated using neutron diffraction…
Understanding the multiple magnetic structures of the intermetallic compound NdMn1.4Co0.6Si2
Madhumita Halder, A. K. Bera, Amit Kumar +2
Magnetic phases for the intermetallic compound NdMn1.4Co0.6Si2 have been investigated at various temperatures by dc magnetization, neutron diffraction and neutron depolarization. O…
Microstructural Evolution of Charged Defects in the Fatigue Process of Polycrystalline BiFeO3 Thin Films
Qingqing Ke, Amit Kumar, Xiaojie Lou +4
Fatigue failure in ferroelectrics has been intensively investigated in the past few decades. Most of the mechanisms discussed for ferroelectric fatigue have been built on the "hypo…
Effect of Zn doping on the Magneto-Caloric effect and Critical Constants of Mott Insulator MnV2O4
Prashant Shahi, Harishchandra Singh, A. Kumar +5
X-ray absorption near edge spectra (XANES) and magnetization of Zn doped MnV2O4 have been measured and from the magnetic measurement the critical exponents and magnetocaloric effec…
Electronic structure and stability of hydrogen defects in diamond and boron doped diamond: A density functional theory study
Ashutosh Upadhyay, Akhilesh Kumar Singh, Amit Kumar
Isolated hydrogen and hydrogen pairs in bulk diamond matrix have been studied using density functional theory calculations. The electronic structure and stability of isolated and p…
Carrier type modulation in current annealed graphene layers
Pawan Kumar, Amit Kumar
We report on the electrical properties of current annealed graphene and few layer graphene devices. It is observed that current annealing for several hours results the n-type dopin…
Crossover from antiferromagnetic to ferromagnetic ordering in semi-Heusler alloys Cu1-xNixMnSb with increasing Ni concentration
Madhumita Halder, S. M. Yusuf, Amit Kumar +2
The magnetic properties and transition from an antiferromagnetic (AFM) to a ferromagnetic (FM) state in semi Heusler alloys Cu1-xNixMnSb, with x < 0.3 have been investigated in det…
Origin of the Enhanced Polarization in La and Mg Co-substituted BiFeO3 Thin Film during the Fatigue Process
Qingqing Ke, Amit Kumar, Xiaojie Lou +2
We have studied the polarization fatigue of La and Mg co-substituted BiFeO3 thin film, where a polarization peak is observed during the fatigue process. The origin of such anomalou…
Oxygen-vacancy-mediated Negative Differential Resistance in La and Mg co-substituted BiFeO3 Thin Film
Qingqing Ke, Amit Kumar, Xiaojie Lou +2
The conductive characteristics of Bi0.9La0.1Fe0.96Mg0.04O3(BLFM) thin film are investigated at various temperatures and a negative differential resistance (NDR) is observed in the…
Ionically-mediated electromechanical hysteresis in transition metal oxides
Yunseok Kim, Anna N. Morozovska, Amit Kumar +5
Electromechanical activity, remanent polarization states, and hysteresis loops in paraelectric TiO2 and SrTiO3 are observed. The coupling between the ionic dynamics and incipient f…
High magnetic field induced charge density waves and sign reversal of the Hall coefficient in graphite
Amit Kumar, Jean-Marie Poumirol, Walter Escoffier +3
We report on the investigation of magnetic field induced charge density wave and Hall coefficient sign reversal in a quasi-two dimensional electronic system of highly oriented pyro…
Nanoscale switching characteristics of nearly tetragonal BiFeO3 thin films
Dipanjan Mazumdar, Vilas Shelke, Milko Iliev +5
We have investigated the nanoscale switching properties of strain-engineered BiFeO3 thin films deposited on LaAlO3 substrates using a combination of scanning probe techniques. Pola…
Spin-Charge-Lattice Coupling through Resonant Multi-Magnon Excitations in Multiferroic BiFeO3
M. O. Ramirez, A. Kumar, S. A. Denev +19
Spin-charge-lattice coupling mediated by multi-magnon processes is demonstrated in multiferroic BiFeO3. Experimental evidence of two and three magnons excitations as well as multim…