Large ground state magnetic moment and magnetocaloric effect in Ni2Mn1.4In0.6

TL;DR

This study reports a large magnetic moment and significant magnetocaloric effect in Ni2Mn1.4In0.6, highlighting its potential for magnetic refrigeration applications due to strong ferromagnetic interactions and high entropy changes.

Contribution

It demonstrates the large ground state magnetic moment and magnetocaloric effect in cubic Ni2Mn1.4In0.6, supported by theoretical calculations explaining the origin of the magnetic properties.

Findings

Magnetic moment of about 6.17 μB/f.u. at 2K.

High adiabatic temperature and entropy changes.

Strong ferromagnetic interactions between Mn-Ni and Mn-Mn sublattices.

Abstract

A large conventional magnetocaloric effect at the second order magnetic transition in cubic Ni2Mn1.4In0.6 Heusler alloy is reported. The isothermal magnetization at 2K shows a huge ground state magnetic moment of about 6.17 {\mu}B/f.u. The theoretical calculations show that the origin of the large magnetic moment in cubic Ni2Mn1.4In0.6 results from the strong ferromagnetic interaction between Mn- Ni and Mn-Mn sublattices. The experimental magnetic moment is in excellent agreement with the moment calculated from the theory. The large magnetic moment gives rise to considerably high adiabatic temperature and entropy changes at the magnetic transition. The present study opens up the possibility to explore cubic Heusler alloys for magnetocaloric applications.