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Dynamics of Spatially Inhomogeneous Spin Polarization of Nonequilibrium Conduction Electrons in Magnetic Transitions
Russian Acad Sci, Kotelnikov Inst Radioengn & Elect, Moscow, Russia..
Russian Acad Sci, Inst Microelect Technol & High Purity Mat, Chernogolovka, Russia..
Russian Acad Sci, Kotelnikov Inst Radioengn & Elect, Moscow, Russia..
Natl Res Univ Moscow Power Engn Inst, Moscow, Russia..
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2019 (English)In: Physics of the solid state, ISSN 1063-7834, E-ISSN 1090-6460, Vol. 61, no 6, p. 941-951Article in journal (Refereed) Published
Abstract [en]

The equation of the dynamics of the magnetic moment motion that has been averaged over the ensemble of nonequilibrium spin-injected electrons in a ferromagnetic transition in the presence of exchange interaction, interaction with an external electromagnetic field, and a thermostat has been obtained taking into account the spatial inhomogeneity of the charge carrier distribution. It has been shown that taking into account the spatial inhomogeneity of the charge carrier distribution in the equation of the dynamics of the magnetic moment motion allows for describing the various processes of electron transfer in the magnetic transition. The probability of quantum transitions of electrons with opposite spin directions, which determine spin relaxation in interaction with a thermostat, has been estimated. It has been shown that the anisotropy of the radiation medium is determined not only by the anisotropy of the sd-exchange tensor, but also by the additional anisotropy that is caused by the electron impulse derivatives of this tensor. The considered phenomena have a great potential for the detection of new effects and development of new devices based on them, including compact tunable radiation sources in the terahertz frequency range, which is obviously difficult to generate.

Place, publisher, year, edition, pages
PLEIADES PUBLISHING INC , 2019. Vol. 61, no 6, p. 941-951
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URN: urn:nbn:se:kth:diva-255212DOI: 10.1134/S1063783419060283ISI: 000472102000002Scopus ID: 2-s2.0-85067600782OAI: oai:DiVA.org:kth-255212DiVA, id: diva2:1348183
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QC 20190903

Available from: 2019-09-03 Created: 2019-09-03 Last updated: 2019-09-03Bibliographically approved

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Korenivski, Vladislav

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