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Lee, Jun Hee
Quantum Materials for Energy Conversion Lab.
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Magnetic Frustration Driven by Itinerancy in Spinel CoV2O4

Author(s)
Lee, Jun HeeMa, J.Hahn, S. E.Cao, H. B.Lee, M.Hong, TaoLee, H. -J.Yeom, M. S.Okamoto, S.Zhou, H. D.Matsuda, M.Fishman, R. S.
Issued Date
2017-12
DOI
10.1038/s41598-017-17160-0
URI
https://scholarworks.unist.ac.kr/handle/201301/23150
Fulltext
https://www.nature.com/articles/s41598-017-17160-0
Citation
SCIENTIFIC REPORTS, v.7, pp.17129
Abstract
Localized spins and itinerant electrons rarely coexist in geometrically-frustrated spinel lattices. They exhibit a complex interplay between localized spins and itinerant electrons. In this paper, we study the origin of the unusual spin structure of the spinel CoV2O4, which stands at the crossover from insulating to itinerant behavior using the first principle calculation and neutron diffraction measurement. In contrast to the expected paramagnetism, localized spins supported by enhanced exchange couplings are frustrated by the effects of delocalized electrons. This frustration produces a non-collinear spin state even without orbital orderings and may be responsible for macroscopic spin-glass behavior. Competing phases can be uncovered by external perturbations such as pressure or magnetic field, which enhances the frustration.
Publisher
NATURE PUBLISHING GROUP
ISSN
2045-2322
Keyword
AUGMENTED-WAVE METHOD

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