Sign reversal of planar Hall effect with temperature in La-doped Sr2IrO4 films

doi:10.1063/5.0134002

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	Sign reversal of planar Hall effect with temperature in La-doped Sr2IrO4 films
	M. R. Liu; J. N. Yue; J. C. Meng; T. N. Shao; C. L. Yao; X. J. Sun; J. C. Nie and D. B. Li
	2023
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	122 期号:2 页码:6
摘要	Electron-doped Sr2IrO4 is the best candidate for unconventional superconductivity, but direct evidence of superconductivity has not been experimentally confirmed. Therefore, it is urgent to explore the complex and rich physical properties caused by doping. The planar Hall effect (PHE) is a sensitive technique for the characterization of intrinsic magnetic properties in magnetic thin films and is applied widely in spintronic devices. In this work, the PHE for La-doped Sr2IrO4 films as a function of the magnetic field direction and temperature exhibited unique properties caused by electron doping. The amplitude of PHE is proportional to the strength of the applied magnetic field. Remarkably, as the temperature increased, a sign reversal of angle-dependent PHE occurred at 90 K, which indicated the change of magnetic anisotropy. Subsequent variable-temperature traditional Hall measurements and time-resolved optical studies eliminated different types of carrier interactions. The anisotropic magnetoresistance measurements indicated that the sign reversal can be attributed to the changes of a spin structure after electron doping, and the reversal temperature is related to the strength of ferromagnetism. These results provide a platform to study the magnetic interactions and suggest the possibility of realizing thermal controllable magnetic sensor devices in electron-doped Sr2IrO4 films.
DOI	10.1063/5.0134002
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收录类别	sci ; ei
语种	英语
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67703
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	M. R. Liu,J. N. Yue,J. C. Meng,et al. Sign reversal of planar Hall effect with temperature in La-doped Sr2IrO4 films[J]. Applied Physics Letters,2023,122(2):6.
APA	M. R. Liu.,J. N. Yue.,J. C. Meng.,T. N. Shao.,C. L. Yao.,...&J. C. Nie and D. B. Li.(2023).Sign reversal of planar Hall effect with temperature in La-doped Sr2IrO4 films.Applied Physics Letters,122(2),6.
MLA	M. R. Liu,et al."Sign reversal of planar Hall effect with temperature in La-doped Sr2IrO4 films".Applied Physics Letters 122.2(2023):6.

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