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A relativistic RKKY interaction between two magnetic impurities-the origin of a magnetic anisotropic effect

Staunton, Julie, Gyorffy, Balazs L., Poulter, J, Strange, Paul (1988) A relativistic RKKY interaction between two magnetic impurities-the origin of a magnetic anisotropic effect. Journal of Physics C: Solid State Physics, 21 (8). pp. 1595-1611. ISSN 0022-3719. (doi:10.1088/0022-3719/21/8/032) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:49676)

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We have developed a theoretical approach for examining magnetic anisotropic effects in metals. It is based upon a fully relativistic spin-polarised multiple scattering framework for describing the electrons. We apply the formalism to the situation of two magnetic impurities in a host material modelled by an electron gas with a uniform positively charged background and obtain an interaction between the two moments mediated by the relativistic electron gas. Apart from depending on the usual spatially isotropic ‘spin-spin’ term, the interaction is shown to be a polynomial function of anisotropic, Dzyaloshinsky- Moriya and pseudo-dipolar-type terms. These anisotropic terms are a direct consequence of the inclusion of relativistic (spin-orbit coupling) effects. We consider two impurities and examine how this interaction changes as the spin-polarisation effect grows with respect to the spin-orbit coupling. Finally, we study the interaction between two iron and then two cobalt impurities.

Item Type: Article
DOI/Identification number: 10.1088/0022-3719/21/8/032
Uncontrolled keywords: Physics of Quantum Materials
Subjects: Q Science > QC Physics > QC176 Solid state physics
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: Paul Strange
Date Deposited: 23 Jul 2015 13:11 UTC
Last Modified: 25 Jan 2020 04:07 UTC
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