Effect of pressure on magnetization and magnetostriction jumps in the manganite Eu$_{0.58}$Sr$_{0.42}$MnO$_{3}$

TL;DR

This study investigates how pressure influences magnetization and magnetostriction jumps in Eu$_{0.58}$Sr$_{0.42}$MnO$_{3}$, revealing pressure-induced suppression of metastable states and emphasizing the role of phase separation in magnetic transitions.

Contribution

It provides new insights into pressure effects on magnetization jumps and magnetostriction in phase-separated manganites, highlighting the importance of the frozen phase separated state.

Findings

Pressure lowers the critical magnetic field for magnetization jumps.

No discrepancy in critical field between bulk and powder samples.

Pressure suppresses the metastable blocked state.

Abstract

We have demonstrated the effect of pressure on magnetization jump and its associated magnetostriction in Eu$_{0.58}$Sr$_{0.42}$MnO$_{3}$. The critical field lowered by the applied pressure is explained by a suppression of the metastable blocked state, which is inherent to the phase separated manganite system exhibiting the magnetic avalanche. To reduce a factor of the bad thermal coupling in the bulk sample, and to further examine the nature of the magnetization jump, we have performed the influence of pressure on the isothermal magnetization of the powder sample. There is no discrepancy in the critical field between the bulk and powder samples although the $MH$ curve of the latter is not saturated at high fields. These findings indicate a crucial role of the frozen phase separated state in the abrupt transition.