Field- and pressure-induced phases in Sr4Ru3O10: A spectroscopic investigation
Rajeev Gupta, M. Kim, H. Barath, S. L. Cooper, G. Cao
Abstract
We have investigated the magnetic-field- and pressure-induced structural and magnetic phases of the triple-layer ruthenate - Sr4Ru3O10. 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 B1g mode ( 380 cm-1) at low temperatures (T < 75K), which can be explained consistently with the field dependent Raman data.
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