Magnetic phase diagram of the austenitic Mn-rich Ni–Mn–(In, Sn) Heusler alloys

Abstract

Heusler compounds have been intensively studied owing to the important technological advancements that they provide in the field of shape memory, thermomagnetic energy conversion and spintronics. Many of their intriguing properties are ultimately governed by their magnetic states and understanding and possibly tuning them is evidently of utmost importance. In this work we examine the Ni1.92Mn1.44(Snx In1-x)0.64 alloys with Density Functional Theory simulations and 55Mn Nuclear Magnetic Resonance and combine these two methods to carefully describe their ground state magnetic order. In addition, we compare the results obtained with the conventional generalized gradient approximation with the ones of strongly constrained and appropriately normed (SCAN) semilocal functionals for exchange and correlation. Experimental results eventually allow to discriminate between two different scenarios identified by ab initio simulations.

Half‐Metallicity in Ni2XMn Heusler Alloys (X = Fe, Co, Cr): Ab Initio Calculations

“…The magnetic behavior of the nickel atoms is coupled with the dominant effect. [21,22] However, magnetic effects are not the sole remarkable aspects of this type of alloy. For example, reports highlight the presence of giant elastocaloric effects in Ni-Mn-In [23,24] and Ni-Mn-Sn [25] alloys.…”