Effects of hydrostatic pressure on the magnetism and martensitic transition of Ni-Mn-In magnetic superelastic alloys

TL;DR

This study investigates how hydrostatic pressure influences the martensitic transition and magnetism in Ni-Mn-In alloys, revealing significant shifts in transition temperatures and potential for pressure-induced phase changes.

Contribution

It provides new insights into pressure effects on martensitic transition temperatures and magnetic properties in Ni-Mn-In alloys, highlighting the possibility of inducing transitions with low pressures.

Findings

Transition temperatures increase with pressure.

Ni50Mn34In16 shows the largest temperature shift rate.

Pressure can induce martensitic transition at low pressures.

Abstract

We report magnetization and differential thermal analysis measurements as a function of pressure accross the martensitic transition in magnetically superelastic Ni-Mn-In alloys. It is found that the properties of the martensitic transformation are significantly affected by the application of pressure. All transition temperatures shift to higher values with increasing pressure. The largest rate of temperature shift with pressure has been found for Ni$_{50}$Mn$_{34}$In$_{16}$ as a consequence of its small entropy change at the transition. Such a strong pressure dependence of the transition temperature opens up the possibility of inducing the martensitic transition by applying relatively low hydrostatic pressures.