Sign reversal of anisotropic magnetoresistance and anomalous thickness-dependent resistivity in Sr2CrWO6/SrTiO3 films

doi:10.1088/1674-1056/ac6164

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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
刊名	Chinese Physics B
	2022
卷号	31 期号:10 页码:7
ISSN号	1674-1056
DOI	10.1088/1674-1056/ac6164
英文摘要	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.
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语种	英语
内容类型	期刊论文
源URL	[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.