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강상관계 물질 연구단
강상관계 물질 연구단
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Magnetic interactions in PdCrO2 and their effects on its magnetic structure

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Title
Magnetic interactions in PdCrO2 and their effects on its magnetic structure
Author(s)
Manh Duc Le; Seyyoung Jeon; Kolesnikov, AI; Voneshen, DJ; Gibbs, AS; Jun Sung Kim; Jinwon Jeong; Han-Jin Noh; Changwil Park; Jaejun Yu; Perring, TG; Je-Geun Park
Publication Date
2018-07
Journal
PHYSICAL REVIEW B, v.98, no.2, pp.024429 -
Publisher
AMER PHYSICAL SOC
Abstract
We report a neutron scattering study of the metallic triangular lattice antiferromagnet PdCrO2. Powder neutron diffraction measurements confirm that the crystalline space group symmetry remains R (3) over barm below T-N. This implies that magnetic interactions consistent with the crystal symmetry do not stabilize the noncoplanar magnetic structure, which was one of two structures previously proposed on the basis of single crystal neutron diffraction measurements. Inelastic neutron scattering measurements find two gaps at low energies, which can be explained as arising from a dipolar-type exchange interaction. This symmetric anisotropic interaction also stabilizes a magnetic structure very similar to the coplanar magnetic structure, which was also suggested by the single crystal diffraction study. The higher-energy magnon dispersion can be modelled by linear spin-wave theorywith exchange interactions up to sixth nearest neighbors, but discrepancies remain which hint at additional effects unexplained by the linear theory
URI
https://pr.ibs.re.kr/handle/8788114/5026
ISSN
2469-9950
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
김준성(공동)_PhysRevB_Magnetic interactions in PdCrO2 and their effects on its magnetic structure.pdfDownload

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