Strain Induced Nanopillars and Variation of Magnetic Properties in La0.825Sr0.175MnO3/LaAlO3 Films

被引：0

作者：

李鑫 ^{[1
]}

韩景智 ^{[1
]}

张雄祚 ^{[1
]}

张银峰 ^{[1
]}

田海东 ^{[1
]}

薛明珠 ^{[1
]}

李昆 ^{[1
]}

闻馨 ^{[1
]}

杨文云 ^{[1
]}

刘顺荃 ^{[1
]}

王常生 ^{[1
]}

杜红林 ^{[1
]}

张晓东 ^{[1
]}

王心安 ^{[2
]}

杨应昌 ^{[1
]}

杨金波 ^{[1
,3
]}

机构：

[1] State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics,Peking University

[2] Ningxia Magvalley Novel Materials Technology Co., Ltd.New Energy Sub-Park,Ningdong Energy & Chemical Industry Base

[3] Beijing Key Laboratory for Magnetoelectric Materials and Devices

来源：

Chinese Physics Letters | 2019年 / 36卷 / 04期

基金：

中国国家自然科学基金;

关键词：

HRTEM; Sr; MnO3/LaAlO3; Films;

D O I：

暂无

中图分类号：

O484 [薄膜物理学];

学科分类号：

080501 ; 1406 ;

摘要：

To investigate the process of strain relaxation and resultant variation of microstructure and magnetic properties,low-doped La0.825Sr0.175MnO3epitaxial films with different thicknesses are deposited on LaAlO3substrates and strain induced nanopillars are discovered inside the La0.825Sr0.175MnO3film. Perpendicular oriented nanopillars mainly exist below 30 nm and tend to disappear above 30 nm. The distribution of nanopillars not only induce the variation of lattice parameters and local structural distortion but also lead to the deviation of easy magnetization axis from the perpendicular direction. Specifically, the out-of-plane lattice parameters of the film decrease quickly with the increase of the thickness but tend to be constant when the thickness is above 30 nm. Meanwhile, the variations of magnetic properties along in-plane and out-of-plane directions would also decline at first and they then remain nearly unchanged. Our work constructs the relationship between nanopillars and magnetic properties inside films. We are able to clearly reveal the effects of inhomogeneous strain relaxation.

引用

页码：61 / 65

页数：5