Pulikkotil, J. J. and Auluck, S. and Rout, P. K and Budhani, R. C. (2012) Effect of pressure on itinerant magnetism and spin disorder in cubic FeGe. Journal of Physics: Condensed Matter, 24 (9). 096003-096008. ISSN 0953-8984

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Abstract

The results of ab initio calculations of the pressure dependence of Fe magnetism in cubic FeGe are presented. We find that when the pressure-volume scale is set by means of generalized gradient approximation total energies and magnetism is described by means of the local density approximation, the critical pressure at which the magnetic phase transition occurs is estimated at approximate to 18 GPa, which is in good agreement with experiments. Using the disordered local moment method we find a localized to itinerant model cross-over of Fe magnetism in cubic FeGe, as a function of volume. Moreover, our calculations also suggest subtle signatures of longitudinal spin fluctuations in cubic FeGe, and that the stiffness parameter softens with increasing pressure. We associate the retention of metallicity in FeGe under pressure with the spin-disorder scattering. The effect of spin-orbit coupling on the electronic structure is also discussed.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s IOP Publishing.
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	20 Feb 2020 08:35
Last Modified:	20 Feb 2020 08:35
URI:	http://npl.csircentral.net/id/eprint/3620

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