Guo Qi, Xu Xiaoguang, Wang Fang, Lu Yunhao, Chen Jikun, Wu Yanjun, Meng Kangkang, Wu Yong, Miao Jun, Jiang Yong
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
Nanotechnology. 2018 Jun 1;29(22):224003. doi: 10.1088/1361-6528/aab5fb. Epub 2018 Mar 12.
We report the in-plane electric field controlled ferromagnetism of LaSrMnO (LSMO) films epitaxially deposited on [Pb(MgNb)O]-(PbTiO) (PMN-PT) (001), (011) and (111) single crystal substrates. The in-plane coercivities (H ) and remanences of the LSMO films greatly depend on the in-plane electric field applied on the PMN-PT (001) and (011) substrates. The experimental change of H is consistent with the Stoner-Wohlfarth model and first principle calculation with the electric field varying from -10 to 10 kV cm. Moreover, the Curie temperature and anisotropic magnetoresistance of the LSMO films can also be manipulated by an in-plane electric field. Finally, the LSMO/PMN-PT (001) heterostructure is designed to be a new kind of magnetic signal generator with the source of electric field.
我们报道了外延生长在[Pb(MgNb)O]-(PbTiO)（PMN-PT）(001)、(011)和(111)单晶衬底上的LaSrMnO（LSMO）薄膜的面内电场控制铁磁性。LSMO薄膜的面内矫顽力（H ）和剩磁很大程度上取决于施加在PMN-PT（001）和（011）衬底上的面内电场。H 的实验变化与斯托纳-沃尔法斯模型以及电场在-10至10 kV/cm范围内变化的第一性原理计算结果一致。此外，LSMO薄膜的居里温度和各向异性磁电阻也可以通过面内电场进行调控。最后，LSMO/PMN-PT（001）异质结构被设计成一种带有电场源的新型磁信号发生器。
