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arXiv · 1808.05044

Spin density wave as a superposition of two magnetic states of opposite chirality and its implications

Elijah E. Gordona·Shahab Derakhshanb·Corey M. Thompsonc·Myung-Hwan Whangbo
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Abstract

A magnetic solid with weak spin frustration tends to adopt a noncollinear magnetic structure such as cycloidal structure below a certain temperature and a spin density wave (SDW) slightly above this temperature. The causes for these observa-tions were explored by studying the magnetic structures of BaYFeO4, which undergoes an SDW and a cycloidal phase transi-tion below 48 and 36 K, respectively, in terms of density func-tional theory calculations. We show that an SDW structure aris-es from a superposition of two magnetic states of opposite chi-rality, an SDW state precedes a chiral magnetic state due to the lattice relaxation, and whether an SDW is transversal or longitudinal is governed by the magnetic anisotropy of magnetic ions.

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Elijah E. Gordona, Shahab Derakhshanb, Corey M. Thompsonc, Myung-Hwan Whangbo. 2018-08-15. Spin density wave as a superposition of two magnetic states of opposite chirality and its implications. https://doi.org/10.1021/acs.inorgchem.8b01494

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