Effect of simultaneous application of field and pressure on magnetic transitions in La${_{0.5}}$Ca${_{0.5}}$MnO${_{3}}$

TL;DR

This study investigates how hydrostatic pressure and magnetic field influence magnetic phase transitions in La${_{0.5}}$Ca${_{0.5}}$MnO${_{3}}$, revealing pressure-induced anomalies and phase suppression at high fields.

Contribution

It demonstrates the asymmetric effects of pressure on magnetic hysteresis and phase transitions, highlighting pressure thresholds that significantly alter magnetic behavior.

Findings

Pressure affects thermal hysteresis asymmetrically.

Abrupt changes in supercooling and magnetization at 0.68kbar.

Transition to antiferromagnetic phase disappears at high field and pressure.

Abstract

We study combined effect of hydrostatic pressure and magnetic field on the magnetization of La${_{0.5}}$Ca${_{0.5}}$MnO${_{3}}$. We do not observe any significant effect of pressure on the paramagnetic to ferromagnetic transition. However, pressure asymmetrically affects the thermal hysteresis across the ferro-antiferromagnetic first-order transition, which has strong field dependence. Though the supercooling (T*) and superheating (T**) temperatures decrease and the value of magnetization at 5K (M$_{5K}$) increases with pressure, T* and M$_{5K}$ shows abrupt changes in tiny pressure of 0.68kbar. These anomalies enhance with field. In 7Tesla field, transition to antiferromagnetic phase disappears in 0.68kbar and M$_{5K}$ show significant increase. Thereafter, increase in pressure up to $\sim$10kbar has no noticeable effect on the magnetization.