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In-plane magnetic anisotropy in strontium iridate Sr2IrO4

Title
In-plane magnetic anisotropy in strontium iridate Sr2IrO4
Authors
Nauman, MuhammadHong, YunjeongHussain, TayyabaSeo, M. S.Park, S. Y.Lee, N.Choi, Y. J.Kang, WounJo, Younjung
Ewha Authors
강원
SCOPUS Author ID
강원scopus
Issue Date
2017
Journal Title
PHYSICAL REVIEW B
ISSN
2469-9950JCR Link2469-9969JCR Link
Citation
vol. 96, no. 15
Publisher
AMER PHYSICAL SOC
Indexed
SCI; SCIE WOS
Abstract
Magnetic anisotropy in strontium iridate (Sr2IrO4) is found to be large because of the strong spin-orbit interactions. In our work, we studied the in-plane magnetic anisotropy of Sr2IrO4 and traced the anisotropic exchange interactions between the isospins in the crystal. The magnetic-field-dependent torque t (H) showed a prominent transition from the canted antiferromagnetic state to the weak ferromagnetic (WFM) state. A comprehensive analysis was conducted to examine the isotropic and anisotropic regimes and probe the easy magnetization axis along the ab plane. The angle-dependent torque tau(theta) revealed a deviation from the sinusoidal behavior, and small differences in hysteresis were observed around 0 degrees and 90 degrees in the low-magnetic-field regime. This indicates that the orientation of the easy axis of the FM component is along the b axis, where the antiferromagnetic toWFMspin-flop transition occurs. We compared the coefficients of the magnetic susceptibility tensors and captured the anisotropy of the material. The in-plane tau(theta) revealed a tendency toward isotropic behavior for fields with values above the field value of the WFM transition.
DOI
10.1103/PhysRevB.96.155102
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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