Magnetic Properties of Mn2RhSi Heusler Alloy: Phase Transition and Hysteresis Behavior at a Very Low Temperature

Abstract

Using Kaneyoshi approximation in the framework of effective field theory, we have carried out theoretically the magnetic phase transition and hysteresis behavior at a very low temperature in Mn2RhSi Heusler Alloy (Mn2RhSi-HA). The alloy shows to a ferrimagnetic successive phase transition while its atoms exhibit a various successive phase transition with Tt = 0.630 and TC = 1.560. At a very low temperature, we attain that the alloy has a multistep hysteresis behavior having a butterfly-like hysteresis loop with a large coercivity field while the Si1 atom shows a type-II superconducting hysteresis behavior. Step-like hysteresis behavior at low temperature is due to quantum tunneling of the magnetization. So, we suggest Mn2RhSi-HA could be a potential candidate for magnetic storage device application. Moreover, we can conclude that the competition of antiferromagnetic and ferromagnetic exchange couplings leads to the variety of magnetic phase transition and the hysteresis behavior in Mn2RhSi-HA and its atoms. We can also conclude that these atoms and their exchange interactions to other atoms make a significant contribution to controlling the hysteresis behavior of Mn2RhSi-HA, since the Mn and Rh2 core atoms have the same coercivity as that of Mn2RhSi-HA. The obtained results are consistent with the reported experimental and theoretical results of Mn2-based Heusler alloys and other alloys.