Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.21883/pss.2022.12.54381.426

Аннотация: <jats:p> The values and signs of the contributions to the superexchange interaction of Co<jats:sup>3+</jats:sup> ions in LaCoO<jats:sub>3</jats:sub> in different spin states, namely, the superexchange of a pair of ions in the intermediate (IS) state and the superexchange of a pair of ions, one of which is in the intermediate state Показать полностьюand the other in the high-spin (HS) state, are studied. For this purpose, virtual electron-hole pairs produced in the course of superexchange (the so-called exchange loops) have been studied within the framework of a multiband generalization of the Hubbard model. It is shown that the cobalt ions in the intermediate state are ordered ferromagnetically, while a pair of ions in different HS and IS states makes an AFM contribution to the superexchange. Keywords: superexchange interaction, magnetic structure, Hubbard model, projection operator method, exchange loop. </jats:p>

Журнал: Physics of the Solid State

Выпуск журнала: Т. 64, № 12

Номера страниц: 1887

ISSN журнала: 10637834

Издатель: Ioffe Institute Russian Academy of Sciences

• Polukeev S. I. (Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia)
• Gavrichkov V. A. (Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia)
• Ovchinnikov S. G. (Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia)

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