Non-synchronized rotation of layered spin configurations in La0.825Sr0.175MnO3 /SrTiO3 film

被引：3

作者：

Li, Xin ^{[1
,4
]}

Han, Jingzhi ^{[1
]}

Zhang, Xiongzuo ^{[1
]}

Wu, Rui ^{[3
]}

Zhang, Yinfeng ^{[1
]}

Tian, Haidong ^{[1
]}

Xue, Mingzhu ^{[1
]}

Wen, Xin ^{[1
]}

Li, Zhichao ^{[1
]}

Liu, Shunquan ^{[1
]}

Yang, Wenyun ^{[1
]}

Wang, Changsheng ^{[1
]}

Du, Honglin ^{[1
]}

Zhang, Xiaodong ^{[1
]}

Yang, Yingchang ^{[1
]}

Yang, Jinbo ^{[1
,2
]}

机构：

[1] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[2] Beijing Key Lab Magnetoelect Mat & Devices, Beijing 100871, Peoples R China

[3] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

[4] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

来源：

ACTA MATERIALIA | 2019年 / 181卷

基金：

中国国家自然科学基金;

关键词：

Strongly correlated oxides; Thin film; Magnetic reversal; Transmission electron microscopy; Spin configuration; OXIDE INTERFACES; CHARGE-TRANSFER; MAGNETORESISTANCE;

D O I：

10.1016/j.actamat.2019.09.051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic properties of single perovskite-structure epitaxial film are reported to have layered distribution recently. However, the different responses of spin configurations in individual layers to the variations of temperature and strain state, especially the subtle response of layered film due to structural phase transformation of SrTiO3 (STO) substrate around 105 K, have not been revealed completely. Drastic drop and concomitant abnormal increase of remnant magnetic moments (REM) and coercivity of low-doped La1-xSrxMnO3 (x=0.175) /SrTiO3 film were observed around 105 K only in the in-plane direction, and layered magnetic structures were further inferred based on investigation of microstructure, strain distribution and chemical inhomogeneity. Abnormal change of magnetic properties around 105 K was discussed by a three-layer model, in which softer ferromagnetic layer was supposed to form in the middle layer of strain-induced layered structure, and the spin configuration of middle layer underwent non-synchronous transformation relative to other parts of the film, which may be attributed to the change of in-plane strain inside the film around 105 K. Our work reveals the variation of individual magnetic layers with the increase of temperature through utilizing the remnant magnetic field in measuring system, and the abrupt reversal of spin configurations at the intermediate layer can also serve the design of novel spintronics devices in the future. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：470 / 478

页数：9

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