Field- and pressure-induced phases in Sr4Ru3O10: A spectroscopic investigation - art. no. 067004

被引：50

作者：

Gupta, R

Kim, M

Barath, H

Cooper, SL

Cao, G

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[2] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

[3] Univ Kentucky, Dept Phys, Lexington, KY 40506 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.96.067004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 magnetoelastic coupling in this material. Further, we are able to deduce key magnetoelastic coupling parameters, and evidence that the magnetic moments are localized on the Ru sites. Additionally, pressure-dependent Raman measurements at different temperatures reveal an anomalous negative Gruneisen parameter associated with the B-1g mode (similar to 380 cm(-1)) at low temperatures (T < 75 K), which can be explained consistently with the field-dependent Raman data.

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页数：4

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