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

Torchio, R, Monza, A, Baudelet, F, Pascarelli, S, Mathon, O, Pugh, Emma, Antonangeli, D, Itie, J Paul (2011) Pressure-induced collapse of ferromagnetism in cobalt up to 120 GPa as seen via x-ray magnetic circular dichroism. Physical Review B: Condensed Matter and Materials Physics, 84 (6). ISSN 0163-1829. (doi:10.1103/PhysRevB.84.060403) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:40456)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1103/PhysRevB.84.060403

Abstract

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.

Item Type: Article
DOI/Identification number: 10.1103/PhysRevB.84.060403
Additional information: article number: 060403;
Uncontrolled keywords: Physics of Quantum Materials
Subjects: Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Stewart Brownrigg
Date Deposited: 07 Mar 2014 00:05 UTC
Last Modified: 05 Jul 2019 10:57 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/40456 (The current URI for this page, for reference purposes)
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