mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal University10.26907/mrsej-24101mrisel-240Research ArticleСтатьиEffects of exchange-covalent bonds on the orbital moment of paramagnetic centers with unfilled 3d-shellsEreminM. V.

Kazan 420008

meremin@kpfu.ruKazan Federal UniversityRussian Federation202419042024261SPECIAL ISSUE dedicated to Boris I. Kochelaev's 90th birthday24101 (8 pp.)Copyright © Eremin M.V., 20242024Eremin M.V.Eremin M.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/240

An effective operator of the interaction of the orbital moment of d-electrons with the magnetic field is derived by combining the method of secondary quantization with the technique of irreducible tensor operators. It is found that in addition to renormalization of the matrix elements of the total orbital momentum L there are new terms in the Hamiltonian of the interaction with the magnetic field. The effects are numerically calculated by the example of the ground term of Fe2+ ions in Fe2Mo2O8. Additional magnetic dipole transitions with ∆M = ±3 and ∆M = ±2 are allowed when the magnetic field is directed along the c-axis of the crystal and in the perpendicular orientation, respectively.

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The authors declare that there are no conflicts of interest present.