Nauman, MuhammadISTA ; Hussain, Tayyaba; Choi, Joonyoung; Lee, Nara; Choi, Young Jai; Kang, Woun; Jo, Younjung
Magnetic anisotropy in strontium iridate (Sr2IrO4) is essential because of its strong spin–orbit coupling and crystal field effect. In this paper, we present a detailed mapping of the out-of-plane (OOP) magnetic anisotropy in Sr2IrO4 for different sample orientations using torque magnetometry measurements in the low-magnetic-field region before the isospins are completely ordered. Dominant in-plane anisotropy was identified at low fields, confirming the b axis as an easy magnetization axis. Based on the fitting analysis of the strong uniaxial magnetic anisotropy, we observed that the main anisotropic effect arises from a spin–orbit-coupled magnetic exchange interaction affecting the OOP interaction. The effect of interlayer exchange interaction results in additional anisotropic terms owing to the tilting of the isospins. The results are relevant for understanding OOP magnetic anisotropy and provide a new way to analyze the effects of spin–orbit-coupling and interlayer magnetic exchange interactions. This study provides insight into the understanding of bulk magnetic, magnetotransport, and spintronic behavior on Sr2IrO4 for future studies.
Journal of physics: Condensed matter
YJ was supported by the National Research Foundation of Korea (NRF) (Grant Nos. NRF-2018K2A9A1A06069211 and NRF-2019R1A2C1089017). The work at Yonsei was supported by the NRF (Grant Nos. NRF-2017R1A5A-1014862 (SRC program: vdWMRC center), NRF-2019R1A2C2002601, and NRF-2021R1A2C1006375). WK acknowledges the support by the NRF (Grant Nos. 2018R1D1A1B07050087, 2018R1A6A1A03025340).
Nauman M, Hussain T, Choi J, et al. Low-field magnetic anisotropy of Sr2IrO4. Journal of physics: Condensed matter. 2022;34(13). doi:10.1088/1361-648X/ac484d
Nauman, M., Hussain, T., Choi, J., Lee, N., Choi, Y. J., Kang, W., & Jo, Y. (2022). Low-field magnetic anisotropy of Sr2IrO4. Journal of Physics: Condensed Matter. IOP Publishing. https://doi.org/10.1088/1361-648X/ac484d
Nauman, Muhammad, Tayyaba Hussain, Joonyoung Choi, Nara Lee, Young Jai Choi, Woun Kang, and Younjung Jo. “Low-Field Magnetic Anisotropy of Sr2IrO4.” Journal of Physics: Condensed Matter. IOP Publishing, 2022. https://doi.org/10.1088/1361-648X/ac484d.
M. Nauman et al., “Low-field magnetic anisotropy of Sr2IrO4,” Journal of physics: Condensed matter, vol. 34, no. 13. IOP Publishing, 2022.
Nauman M, Hussain T, Choi J, Lee N, Choi YJ, Kang W, Jo Y. 2022. Low-field magnetic anisotropy of Sr2IrO4. Journal of physics: Condensed matter. 34(13), 135802.
Nauman, Muhammad, et al. “Low-Field Magnetic Anisotropy of Sr2IrO4.” Journal of Physics: Condensed Matter, vol. 34, no. 13, 135802, IOP Publishing, 2022, doi:10.1088/1361-648X/ac484d.
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