Giant Magnetic Anisotropy Induced by Ligand LS Coupling in Layered Cr Compounds

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Title
Giant Magnetic Anisotropy Induced by Ligand LS Coupling in Layered Cr Compounds
Author(s)
Kim, DH; Kim, K; Ko, KT; JunHo Seo; Jun Sung Kim; Jang, TH; Kim, Y; Jae-Young Kim; Cheong, SW; Park, JH
Publication Date
2019-05
Journal
PHYSICAL REVIEW LETTERS, v.122, no.20, pp.207201 -
Publisher
AMER PHYSICAL SOC
Abstract
We propose a novel origin of magnetic anisotropy to explain the unusual magnetic behaviors of layered ferromagnetic Cr compounds (3d(3)) wherein the anisotropy field varies from less than or similar to 0.01 to similar to 3 T on changing the ligand atom in a common hexagonal structure. The effect of the ligand p orbital spin-orbit (LS) coupling on the magnetic anisotropy is explored by using four-site full multiplet cluster model calculations for energies involving the superexchange interaction at different spin axes. Our calculation shows that the anisotropy energy, which is the energy difference for different spin axes, is strongly affected not only by the LS coupling strength but also by the degree of p-d covalency in the layered geometry. This anisotropy energy involving the superexchange appears to dominate the magnetic anisotropy and even explains the giant magnetic anisotropy as large as 3 T observed in CrI3.
URI
https://pr.ibs.re.kr/handle/8788114/6175
ISSN
0031-9007
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
Files in This Item:
2019_PRL_김재영, 김준성공동_ Giant Magnetic Anisotropy Induced by Ligand LS Coupling in Layered Cr Compounds.pdfDownload

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