Pressure-induced collapse of ferromagnetism in cobalt up to 120 GPa as seen via x-ray magnetic circular dichroism

被引：29

作者：

Torchio, R. ^{[1
,2
]}

Monza, A. ^{[3
]}

Baudelet, F. ^{[3
]}

Pascarelli, S. ^{[1
]}

Mathon, O. ^{[1
]}

Pugh, E. ^{[4
]}

Antonangeli, D. ^{[5
]}

Itie, J. Paul ^{[3
]}

机构：

[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[2] Univ Roma Tre, Dipartimento Fis, Rome, Italy

[3] Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France

[4] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[5] Univ Paris 06, Inst Mineral & Phys Milieux Condeses, CNRS, UMR 7590, F-75005 Paris, France

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 06期

关键词：

BCC-HCP TRANSITION; ABSORPTION-SPECTROSCOPY; CRYSTAL-STRUCTURE; METALS; EDGE; CO; SUPERCONDUCTIVITY; FE;

D O I：

10.1103/PhysRevB.84.060403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetism and structure of compressed Co has been studied up to 120 GPa using K-edge x-ray magnetic circular dichroism (XMCD) and x-ray absorption near edge spectroscopy (XANES). The XMCD signal decreases linearly with pressure and is totally suppressed around 120 GPa at ambient temperature. We detect local fcc-like atomic configurations starting from 80 GPa and at 120 GPa these represent at least 40% of the total. Supporting theoretical calculations indicate that the mixed hcp/fcc phase above 120 GPa is nonmagnetic. Comparison between the pressure evolution of magnetism and structure highlights major differences between the Fe and Co cases.

引用

页数：4

共 35 条

[1] Real-space multiple-scattering calculation and interpretation of x-ray-absorption near-edge structure [J].