Ising exchange interaction in lanthanides and actinides

Abstract

The Ising exchange interaction is a limiting case of strong exchange anisotropy and represents a key property of many magnetic materials. Here we find necessary and sufficient conditions to achieve Ising exchange interaction for metal sites with unquenched orbital moments. Contrary to current views, the rules established here narrow much the range of lanthanide and actinide ions which can exhibit Ising exchange interaction. It is shown that the arising Ising interaction can be of two distinct types: (i) coaxial, with magnetic moments directed along the anisotropy axes on the metal sites and (ii) non-coaxial, with arbitrary orientation of one of magnetic moments. These findings will contribute to purposeful design of lanthanide and actinide based materials.

19 pages, 2 figures

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Cited by in corpus (4)

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• New mechanism of kinetic exchange interaction induced by strong magnetic anisotropy
• Lanthanide-radical magnetic coupling in [LnPc${}_2$]${}^0$: Competing exchange mechanisms captured via ab initio multi-reference calculations
• A primer on Kitaev Model: Basic aspects, material realization, and recent experiments