Out-of-plane magnetic anisotropy enhancement in La1-xSrxCoO3-δ/La2/3Sr1/3MnO3/La1-xSrxCoO3-δ thin films

被引：11

作者：

Wang, Wei ^{[1
,2
,3
]}

Zhang, Jine ^{[1
,2
]}

Shen, Xi ^{[1
]}

Guan, Xiangxiang ^{[1
,2
]}

Yao, Yuan ^{[1
]}

Li, Junjie ^{[1
]}

Gu, Changzhi ^{[1
,2
]}

Sun, Jirong ^{[1
,2
]}

Zhu, Yimei ^{[3
]}

Tao, Jing ^{[3
]}

Yu, Richeng ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

[3] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Div, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 02期

基金：

中国国家自然科学基金;

关键词：

METAL-INSULATOR-TRANSITION; CRYSTAL-STRUCTURE; MICROSCOPIC ORIGIN; STATE; HETEROSTRUCTURES; MULTILAYERS;

D O I：

10.1103/PhysRevB.101.024406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Perpendicular magnetic anisotropy (PMA) in multilayer thin films promotes the development of spintronic and magnonic research fields. The origin of the PMA deserves a thorough investigation since it contains rich physics related to multiple factors in the heterostructure system. Here, we study the origin of PMA in La2/3Sr1/3MnO3 (LSMO) thin films sandwiched by La1-xSrxCoO3-delta (LSCO) layers grown on SrTiO3 substrate, using aberration-corrected scanning transmission electron microscopy. Our findings indicate that the lattice and electronic structures of LSMO can be modified through the inhomogeneous strains induced by nanodomains in LSCO layers. Moreover, we infer that the lattice distortion in LSCO at low temperatures is a driving force to reorient the spin moment from in-plane direction to out-of-plane direction in LSMO, which could be the nature of the PMA formation. The symmetry breaking in the LSMO layer induced by the domains from LSCO enhances magnetic anisotropy energy in LSMO.

引用

页数：8

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