Publications (22)
Generalizations of Jacobsthal sums and hypergeometric series over finite fields
Pramod Kumar Kewat, Ram Kumar
For non-negative integers , we define character sums and over a finite field whi…
Correlation of exchange bias with magneto-structural effects across the compensation temperature of Co(CrFe)O (x = 0.05 and 0.075)
Ram Kumar, R. Padam, S. Rayaprol +2
A small amount of Fe (5% and 7.5%) substitution in the Cr-site of the multiferroic compound CoCr2O4 leads to a magnetization reversal. In these compounds, we report a sign change i…
Resilient =3/2 superconductivity in topological semimetal YPtBi
Prathum Saraf, Nicholas A. Crombie, Rahul Sharma +11
Cooper pairing in most of the known fermionic superfluids occurs via spin-1/2 quasiparticle interactions that lead to spin-singlet or spin-triplet pairing. In the topological semim…
Magnetic and transport anomalies in R2RhSi3 (R= Gd, Tb, and Dy), resembling those of an exotic magnetic skyrmion Gd2PdSi3
Ram Kumar, Kartik K Iyer, P. L. Paulose +1
We have carried out magnetization, heat capacity, electrical and magnetoresistance measurements (2-300 K) for the polycrystalline form of intermetallic compounds, R2RhSi3 (R= Gd, T…
Existence of a critical canting angle of magnetic moments to induce multiferroicity in the Haldane spin-chain system, Tb2BaNiO5
Ram Kumar, Sudhindra Rayaprol, Sarita Rajput +5
We report an unusual canted magnetism due to 3d and 4f electrons, occupying two different crystallographic sites, with its consequence to electric dipole order. This is based on ne…
Dilute Paramagnetism and Non-Trivial Topology in Quasicrystal Approximant FeAl
Keenan E. Avers, Jarryd A. Horn, Ram Kumar +5
A very fundamental property of both weakly and strongly interacting materials is the nature of its magnetic response. In this work we detail the growth of crystals of the quasicrys…