Field- and pressure-induced phases in Sr$_{4}$Ru$_{3}$O$_{10}$: A spectroscopic investigation

TL;DR

This study explores how magnetic fields and pressure influence the structural and magnetic phases of Sr$_{4}$Ru$_{3}$O$_{10}$ using spectroscopic methods, revealing spin reorientations, magneto-elastic effects, and anomalous phonon behavior.

Contribution

It provides new insights into the pressure- and field-induced phase transitions and magneto-elastic coupling in Sr$_{4}$Ru$_{3}$O$_{10}$ through spectroscopic analysis.

Findings

Magnetic fields induce spin reorientation transitions.

Strong magneto-elastic coupling observed via phonon spectra.

Anomalous negative Gruneisen-parameter at low temperatures.

Abstract

We have investigated the magnetic-field- and pressure-induced structural and magnetic phases of the triple-layer ruthenate - Sr$_{4}$Ru$_{3}$O$_{10}$. Magnetic-field-induced changes in the phonon spectra reveal dramatic spin-reorientation transitions and strong magneto-elastic coupling in this material. Additionally, pressure-dependent Raman measurements at different temperatures reveal an anomalous negative Gruneisen-parameter associated with the B$_{1g}$ mode ($\sim$ 380 cm$^{-1}$) at low temperatures (T $<$ 75K), which can be explained consistently with the field dependent Raman data.