Emergent quasi-two-dimensional ferromagnetic state with perpendicular magnetic anisotropy at La0.7Sr0.3MnO3/SrCuO2 interface

被引：1

作者：

Shi, Wenxiao ^{[1
,2
]}

Zhang, Jing ^{[3
]}

Zhan, Xiaozhi ^{[4
]}

Li, Jialiang ^{[4
]}

Li, Zhe ^{[1
,2
]}

Zheng, Jie ^{[1
,2
,5
]}

Wang, Mengqin ^{[1
,2
]}

Zhang, Jine ^{[5
]}

Zhang, Hui ^{[5
]}

Zhu, Tao ^{[1
]}

Chen, Yunzhong ^{[1
,2
]}

Hu, Fengxia ^{[1
,2
]}

Shen, Baogen ^{[1
,2
,6
]}

Chen, Yuansha ^{[1
,2
]}

Sun, Jirong ^{[1
,2
,7
]}

机构：

[1] Inst Phys, Chinese Acad Sci, 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] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

[4] Spallat Neutron Source Sci Ctr, Dongguan 523803, Guangdong, Peoples R China

[5] Beihang Univ, Sch Integrated Circuit Sci & Engn, Beijing 100191, Peoples R China

[6] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

[7] Taiyuan Univ Sci & Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China

来源：

APPLIED PHYSICS REVIEWS | 2024年 / 11卷 / 02期

基金：

国家重点研发计划; 中国国家自然科学基金; 美国国家科学基金会;

关键词：

INSULATOR; PHASE; SUPERLATTICES; POLARIZATION; ELECTRON; DRIVEN; OXYGEN;

D O I：

10.1063/5.0183258

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Due to the strong interlayer coupling between multiple degrees of freedom, oxide heterostructures usually produce distinct interfacial phases with unexpected functionalities. Here, we report on the realization of quasi-two-dimensional ferromagnetic state in ultrathin La0.7Sr0.3MnO3 (LSMO) layer down to two unit cells (u.c.), being sandwiched by the planar infinite-layer structured SrCuO2 layers (P-SCO). We find the LSMO/P-SCO interface coupling has greatly suppressed the magnetic dead layer of LSMO, resulting in an emergent interfacial ferromagnetic phase. Thus, robust ferromagnetic order can be maintained in the 2 u.c.-thick LSMO layer (similar to 7.7A degrees), showing a Curie temperature of similar to 260K and remarkable perpendicular magnetic anisotropy. X-ray absorption spectra reveal notable charge transfer from Mn to Cu at the interface, and thus, resulted preferential d3z2 similar to r(2) orbital occupation for interfacial Mn ions plays an important role in the inducing of perpendicular magnetic anisotropy in quasi-two-dimensional LSMO layer. Our work demonstrates a unique approach for tuning the properties of oxides via an interface engineering of oxygen coordination in perovskite/infinite-layer heterostructures.

引用

页数：10