Acoustic emission across the magnetostructural transition of the giant magnetocaloric Gd5Si2Ge2 compound

TL;DR

This study investigates acoustic emission signals during the magnetostructural phase transition in Gd5Si2Ge2, revealing avalanche-like behavior between metastable states, which enhances understanding of the transition dynamics in magnetocaloric materials.

Contribution

It is the first to analyze acoustic emission during the magnetostructural transition in Gd5Si2Ge2, demonstrating avalanche dynamics and transition kinetics.

Findings

Acoustic emission signals are detected during the phase transition.

The transition proceeds via avalanches between metastable states.

Analysis of signals provides insights into transition kinetics.

Abstract

We report on the existence of acoustic emission during the paramagnetic-monoclinic to ferromagnetic-orthorhombic magnetostructural phase transition in the giant magnetocaloric Gd5Si2Ge2 compound. The transition kinetics have been analyzed from the detected acoustic signals. It is shown that this transition proceeds by avalanches between metastable states.