中国科学院长春光学精密机械与物理研究所

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	Sign reversal of anisotropic magnetoresistance and anomalous thickness-dependent resistivity in Sr2CrWO6/SrTiO3 films
	C. L. Yao; T. N. Shao; M. R. Liu; Z. T. Zhang; W. M. Jiang; Q. Zhao; Y. J. Qiao; M. H. Chen; X. Y. Chen; R. F. Dou; C. M. Xiong and J. C. Nie
	2022
发表期刊	Chinese Physics B
ISSN	1674-1056
卷号	31期号:10页码:7
摘要	High-quality Sr2CrWO6 (SCWO) films have been grown on SrTiO3 (STO) substrate by pulsed laser deposition under low oxygen pressure. With decrease of the film thickness, a drastic conductivity increase is observed. The Hall measurements show that the thicker the film, the lower the carrier density. An extrinsic mechanism of charge doping due to the dominance of oxygen vacancies at SCWO/STO interfaces is proposed. The distribution and gradient of carrier concentration in SCWO films are considered to be related to this phenomenon. Resistivity behavior observed in these films is found to follow the variable range hopping model. It is revealed that with increase of the film thickness, the extent of disorder in the lattice increases, which gives a clear evidence of disorder-induced localization charge carriers in these films. Magnetoresistance measurements show that there is a negative magnetoresistance in SCWO films, which is considered to be caused by the magnetic scattering of magnetic elements Cr3+ and W5+. In addition, a sign reversal of anisotropic magnetoresistance (AMR) in SCWO film is observed for the first time, when the temperature varies across a characteristic value, T-M. Magnetization-temperature measurements demonstrate that this AMR sign reversal is caused by the direction transition of easy axis of magnetization from the in-plane ferromagnetic order at T > T-M to the out-of-plane at T < T-M.
DOI	10.1088/1674-1056/ac6164
URL	查看原文
收录类别	sci ; ei
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67076
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	C. L. Yao,T. N. Shao,M. R. Liu,et al. Sign reversal of anisotropic magnetoresistance and anomalous thickness-dependent resistivity in Sr2CrWO6/SrTiO3 films[J]. Chinese Physics B,2022,31(10):7.
APA	C. L. Yao.,T. N. Shao.,M. R. Liu.,Z. T. Zhang.,W. M. Jiang.,...&C. M. Xiong and J. C. Nie.(2022).Sign reversal of anisotropic magnetoresistance and anomalous thickness-dependent resistivity in Sr2CrWO6/SrTiO3 films.Chinese Physics B,31(10),7.
MLA	C. L. Yao,et al."Sign reversal of anisotropic magnetoresistance and anomalous thickness-dependent resistivity in Sr2CrWO6/SrTiO3 films".Chinese Physics B 31.10(2022):7.

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