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Van Hove scenario and superconductivity in full Heusler alloy Pd <inf>2</inf>ZrGa
Date Issued
07-05-2013
Author(s)
Ramesh Kumar, K.
Chunchu, Venkatrao
Thamizhavel, A.
Abstract
Ab-initio band structure calculation using the state-of-the-art density functional theory was carried out for the sample Pd2ZrGa. The equilibrium lattice parameter was found by fitting the energy vs volume data to Murnaghan equation of state and the value was observed to be 6.467 Å. Non analytical behavior of the energy functional was observed in band structure as well as in density of states diagram near the Fermi level. Polycrystalline sample synthesized using arc-furnace showed compositional variation in X-ray diffraction and energy dispersive analysis of X-ray spectrum studies. Magnetic measurements showed Meissner diamagnetic shielding in the as-cast sample below 2 K. From the Zero Field Cooled (ZFC) and Field Cooled (FC) measurements, we observed that the system is a type II BCS superconductor. The volume susceptibility at 2 K was observed to be 3.1 emu/Oe cm3. © 2013 American Institute of Physics.
Volume
113