Quasi-two-dimensional magnetic properties in atomic layer resolved La0.7Sr0.3MnO3/LaAlO3 superlattices
Quasi-two-dimensional magnetic properties in atomic layer resolved La0.7Sr0.3MnO3/LaAlO3 superlattices
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原子层解析La0.7Sr0.3MnO3/LaAlO3超晶格的准二维磁特性
DOI：
10.1103/physrevb.107.085143
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发表时间：
2023
影响因子：
3.7
通讯作者：
Gan Moog Chow
中科院分区：
文献类型：
--
作者：
Bangmin Zhang;Hong Zhang;Xiao Chi;Ping Yang;Jun Ding;Jingsheng Chen;Gan Moog Chow
Materials in low dimension shows interesting physics and excellent potential in practical applications. The atomic-level control of 2D behavior in traditional 3D system is quite hard, and the (La0.7Sr0.3MnO3)n/(LaAlO3)n superlattice on (001) SrTiO3 substrate was investigated to explore its quasi-2D behavior. The number of magnetic phase transition has close relationship with the number of unit cells (n): Only one phase transition for n = 2, and four phase transitions for n = 8. It was found that the local structure of each La0.7Sr0.3MnO3 atomic layer is responsible for the multiple phase transition: the gradual change of tetragonal ratio and the in-plane tensile strain-induced 3d electronic orbital occupancy control the magnetic properties of 2D-LSMO atomic layers. For the outmost 2D-LSMO atomic layer contacting with LaAlO3 directly, interface-related factors reduce the intensity of magnetic interaction significantly. With the increase of n, the properties around the LSMO/LAO interface changes, which demonstrates that the superlattice configuration and the lattice-mismatch strain could be employed to explore the quasi-2D behavior of traditional 3D system.
