Magnetic coupling in La2/3Sr1/3MnO3/SrRuO3 heterostructures grown on SrTiO3 (111) substrates with abrupt interface

被引：0

作者：

Xu, Yichi ^{[1
]}

Wang, Qing ^{[2
]}

Jin, Siqi ^{[1
]}

Liu, Yuxiang ^{[1
]}

Qiu, Xiaoyu ^{[1
]}

Tu, Jie ^{[1
]}

Xu, Xiang ^{[1
]}

Li, Yingjia ^{[1
]}

Zheng, Yonghui ^{[1
]}

Zhao, Qingbiao ^{[3
]}

Zhong, Ni ^{[1
]}

Xiang, Pinghua ^{[1
]}

Wang, Lingfei ^{[2
]}

Chen, Binbin ^{[1
]}

机构：

[1] East China Normal Univ, Dept Elect, Key Lab Polar Mat & Devices MOE, Shanghai 200241, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Hefei 230026, Peoples R China

[3] Wuhan Inst Technol, Sch Chem & Environm Engn, Wuhan 430205, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2024年 / 135卷 / 17期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

EXCHANGE BIAS; OXIDE; FERROMAGNETISM;

D O I：

10.1063/5.0193988

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the magnetic coupling behavior in all-ferromagnetic La0.7Sr0.3MnO3/SrRuO3 (LSMO/SRO) heterostructures deposited on the SrTiO3 (111) substrate, where the interface leads to an enhanced exchange field as compared to the one deposited on SrTiO3 (001). Importantly, high-resolution scanning transmission electron microscopy reveals distinct interface structures of the (111) heterostructures depending on the growth sequence. The heterostructure with an SRO bottom layer shows an atomically flat and abrupt interface, while the one with an LSMO bottom layer shows a deformed interface due to the surface roughening of LSMO deposited directly on SrTiO3 (111). As a result, the heterostructure with an abrupt interface exhibits a robust antiferromagnetic coupling between LSMO and SRO, while the one with a rough interface shows negligible magnetic coupling. Our results demonstrate the key role of an abrupt interface in determining the magnetic properties of oxide heterostructures.

引用

页数：7

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