50 citations · 369 across the 22 of their papers we have counts for
23 papers
Intrinsic Orbital Nernst Effect in Real Photonic Bands
Tao Zhu
We predict an intrinsic orbital Nernst effect in reciprocal photonic lattices with real Bloch modes. In the collisionless regime, a thermal gradient generates a transverse angular-…
AlMnCu: A magnetically ordered member of the Heusler alloy family despite having a valence electron count of 24
Soumya Bhowmik, Santanu Pakhira, Renu Choudhary +6
The magnetic property of the Heusler alloys can be predicted by the famous Slater-Pauling (S-P) rule, which states the total magnetic moment () of such materials can be expres…
Restructuring disorder: Transformation from the antiferromagnetic order in Fe2VSi to the ferromagnetic state in FeRuVSi by substitution of a non-magnetic element
Shuvankar Gupta, Sudip Chakraborty, Celine Barreteau +4
The delicate nature of the half-metallic ferromagnetic (HMF) property in Heusler alloys is often compromised by inherent structural disorder within the systems. Fe2VSi is a prime e…
Randomness in atomic disorder and consequent squandering of spin-polarization in a ferromagnetically fragile quaternary Heusler alloy FeRuCrSi
Shuvankar Gupta, Sudip Chakraborty, Vidha Bhasin +7
RuFeCrSi ( 0 x 1) system is theoretically predicted to be one of the very few known examples of robust half-metallic ferromagnet with 100\% spin polarization. Si…
Origin of magnetic ordering in half-Heusler RuMnGa
Sudip Chakraborty, Shuvankar Gupta, Santanu Pakhira +6
The half-Heusler alloy RuMnGa having valence electron count (VEC) 18 has recently been theoretically proposed to exhibit compensated ferrimagnetic (CFiM) character instead of the e…
Large saturation moment and high ferromagnetic transition temperature in a structurally disordered inverse Heusler alloy Fe2RuGe
Sudip Chakraborty, Shuvankar Gupta, Vidha Bhasin +10
We report the successful synthesis of a new 4 based polycrystalline inverse Heusler alloy FeRuGe by an arc melting process and have studied in detail its structural, magneti…
Experimental observation of spin glass state in highly disordered quaternary Heusler alloy FeRuMnGa
Shuvankar Gupta, Sudip Chakraborty, Santanu Pakhira +8
The realization of spin-glass (S-G) state in Heusler alloys is very rare despite the presence of inherent structural and elemental disorder in those compounds. Although a few half…
4d-element induced improvement of structural disorder and development of weakly re-entrant spin-glass behaviour in NiRuMnSn
Shuvankar Gupta, Sudip Chakraborty, Vidha Bhasin +12
The pursuit of efficient spin-polarization in quaternary Heusler alloys with the general formula (where X, , and Y are transition metals and Z is a p-block element), ha…
High spin-polarization in a disordered novel quaternary Heusler alloy FeMnVGa
Shuvankar Gupta, Sudip Chakraborty, Vidha Bhasin +10
In this work, we report the successful synthesis of a Fe-based novel half-metallic quaternary Heusler alloy FeMnVGa and its structural, magnetic and transport properties probed thr…
Rare observation of spin-gapless semiconducting characteristics and related band topology of quaternary Heusler alloy CoFeMnSn
Shuvankar Gupta, Jyotirmoy Sau, Manoranjan Kumar +1
In this paper, we report the theoretical investigation and experimental realization of a new spin-gapless semiconductor (SGSs) compound CoFeMnSn belonging to the family of quaterna…
Magnetic frustration driven by conduction carrier blocking in NdCoSi
Mily Kundu, Santanu Pakhira, Renu Choudhary +6
The intermetallic compound NdCoSi having a triangular lattice could be synthesized in single-phase only with defect crystal structure. Investigation through d…
Coexisting structural disorder and robust spin-polarization in half-metallic FeMnVAl
Shuvankar Gupta, Sudip Chakraborty, Santanu Pakhira +6
Half-metallic ferromagnets (HMF) are on one of the most promising materials in the field of spintronics due to their unique band structure consisting of one spin sub-band having me…
Superparamagnetic and metal-like Ru2TiGe: a propitious thermoelectric material
Sanchayita Mondal, Krishanu Ghosh, R. Ranganathan +2
We report a study of structural, magnetic, heat capacity and thermoelectric properties of a Rubased Heusler alloy, Ru2TiGe. The magnetic measurements reveal that at higher temperat…
Experimental and theoretical demonstration of negative magnetization induced by particle size reduction in nano-form GdCaMnO
Papri Dasgupta, Sanjukta Paul, S. Kumar +2
We report a pervasive phenomenon of gradual emergence of negative magnetization in typical MnO orthorhombic perovskite manganites in nano form (with being…
Instability and evolution of the magnetic ground state in metallic perovskites GdRhCB
Abhishek Pandey, A. K. Singh, Shovan Dan +7
We report investigations of the structural, magnetic, electrical transport and thermal properties of five compositions of the metallic perovskite GdRhCB ($0.00 \le…
Physical properties of RIr3 (R = Gd, Tb, Ho) compounds with coexisting polymorphic phases
Binita Mondal, Shovan Dan, Sudipta Mondal +3
The binary compounds GdIr3, TbIr3 and HoIr3 are synthesized successfully and found to form in macroscopic co-existence of two polymorphic phases: C15b and AuCu3-type. The dc magnet…
Ferromagnetically correlated clusters in semi-metallic Ru2NbAl Heusler alloy
Sanchayita Mondal, Chandan Mazumdar, R. Ranganathan +4
In this work, we report the structural, magnetic and electrical and thermal transport properties of the Heusler-type alloy Ru2NbAl. From the detailed analysis of magnetization data…
Oscillating magnetoresistance due to fragile spin structure in metallic GdPd
Abhishek Pandey, Chandan Mazumdar, R. Ranganathan +1
Studies on the phenomenon of magnetoresistance (MR) have produced intriguing and application-oriented outcomes for decades--colossal MR, giant MR and recently discovered extremely…
Doping of Ga in antiferromagnetic semiconductor alpha-Cr2O3oxide and its effects on modified magnetic and electronic properties
R. N. Bhowmik, K. Venkata Siva, R. Ranganathan +1
The samples of Ga doped Cr2O3 oxide have been prepared using chemical co-precipitation route. X-ray diffraction pattern and Raman spectra have confirmed rhombohedral crystal struct…
Evidence of structural phase transition in superconducting SmFeAsO_(1-x)F_x from 19^F NMR
M. Majumder, K. Ghoshray, C. Mazumdar +4
We report the resistivity, magnetization and 19^F NMR results in polycrystalline sample of SmFeAsO_(0.86)F_(0.14). The resistivity and the magnetization data show a sharp drop at 4…
Interplay between Co-3d and Ce-4f magnetism in CeCoAsO
Rajib Sarkar, Anton Jesche, Cornelius Krellner +4
We have investigated the ground state properties of polycrystalline CeCoAsO by means of magnetization, specific heat and solid state NMR. Susceptibility and specific-heat measureme…
Metal-insulator Crossover Behavior at the Surface of NiS_2
D. D. Sarma, S. R. Krishnakumar, E. Weschke +8
We have performed a detailed high-resolution electron spectroscopic investigation of NiS and related Se-substituted compounds NiSSe, which are known to be gapped in…
Microwave Properties of Borocarbide Superconductors LnNi2B2C (Ln = Y, Er, Tm, Ho)
T. Jacobs, Balam A. Willemsen, S. Sridhar +6
We report measurements of the microwave surface impedance of the borocarbide family of superconductors LnNi2B2C (Ln=Y, Er, Tm, Ho). The experiments enable direct measurements of th…