Feng Nan, Mi Wenbo, Wang Xiaocha
Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, Faculty of Science, Tianjin University, Tianjin 300072, China.
Phys Chem Chem Phys. 2015 May 28;17(20):13647-53. doi: 10.1039/c5cp01857a.
The electronic structure and magnetic properties of the tetragonal La2/3Sr1/3MnO3/BiFeO3 multiferroic superlattices with different interfacial terminations have been studied by first-principles calculations. Our results for all the models of the tetragonal La2/3Sr1/3MnO3/BiFeO3 superlattices exhibit a metallic electronic structure. More importantly, we find that the magnetoelectric coupling can be realized in the tetragonal La2/3Sr1/3MnO3/BiFeO3 heterostructures by means of exchange bias, which can be attributed to the interfacial exchange coupling. These findings are useful for magnetoelectrically controlled spintronic devices.
通过第一性原理计算研究了具有不同界面终端的四方相La2/3Sr1/3MnO3/BiFeO3多铁性超晶格的电子结构和磁性。我们对四方相La2/3Sr1/3MnO3/BiFeO3超晶格所有模型的研究结果均显示出金属电子结构。更重要的是，我们发现通过交换偏置可在四方相La2/3Sr1/3MnO3/BiFeO3异质结构中实现磁电耦合，这可归因于界面交换耦合。这些发现对于磁电控制的自旋电子器件具有重要意义。
