Anomalous pressure effect on the remanent lattice striction of a (La,Pr)$_{1.2}$Sr$_{1.8}$Mn$_{2}$O$_{7}$ bilayered manganite single crystal

TL;DR

This study investigates how pressure influences magnetostriction and magnetization in a bilayered manganite crystal, revealing that pressure enhances ferromagnetic metallic states and causes anomalous lattice relaxation effects.

Contribution

It provides new insights into pressure-induced changes in magnetostriction and magnetization, highlighting anomalous lattice relaxation phenomena in bilayered manganites.

Findings

Pressure reduces the critical field of the FMM transition.

Pressure enhances remanent magnetostriction.

Anomalous pressure effect on lattice relaxation similar to magnetization behavior.

Abstract

We have studied the pressure effect on magnetostriction, both in the $ab$-plane and along the c-axis, of a (La,Pr)$_{1.2}$Sr$_{1.8}$Mn$_{2}$O$_{7}$ bilayered manganite single crystal over the temperature region where the field-induced ferromagnetic metal (FMM) transition takes place. For comparison, we have also examined the pressure dependence of magnetization curves at the corresponding temperatures. The applied pressure reduces the critical field of the FMM transition and it enhances the remanent magnetostriction. An anomalous pressure effect on the remanent lattice relaxation is observed and is similar to the pressure effect on the remanent magnetization along the c-axis. These findings are understood from the view point that the double-exchange interaction driven FMM state is strengthened by application of pressure.