Magnetic properties of Ni2.18Mn0.82Ga Heusler alloys with a coupled magnetostructural transition

TL;DR

This study investigates the magnetic properties of Ni2.18Mn0.82Ga Heusler alloys exhibiting a coupled magnetostructural transition, revealing unusual magnetic behavior linked to a first-order structural phase change.

Contribution

It provides new insights into the magnetic behavior of Ni2.18Mn0.82Ga alloys with coupled transitions, combining calorimetry, magnetic, and resistivity measurements.

Findings

Coupled magnetostructural transition observed

Unusual magnetic features linked to phase change

First-order transition from tetragonal ferromagnetic to cubic paramagnetic phase

Abstract

Polycrystalline Ni2.18Mn0.82Ga Heusler alloys with a coupled magnetostructural transition are studied by differential scanning calorimetry, magnetic and resistivity measurements. Coupling of the magnetic and structural subsystems results in unusual magnetic features of the alloy. These uncommon magnetic properties of Ni2.18Mn0.82Ga are attributed to the first-order structural transition from a tetragonal ferromagnetic to a cubic paramagnetic phase.