通过氧空位调控多个序参量：以Eu0.5Ba0.5TiO3-\delta为例
材料科学
2017-10-11 v1
摘要
通过氧空位（VO）控制磁性或铁电性等功能特性是过渡金属氧化物未来发展的关键问题。该领域的进展目前主要通过VO变化及其主要对单一序参量的影响来探讨。本文揭示了一种利用VO同时调控磁性与铁电性的新机制。通过Eu0.5Ba0.5TiO3-\delta的实验与密度泛函理论结合研究，我们证明氧空位产生Ti3+ 3d1缺陷态，介导了局域Eu 4f7自旋之间的铁磁耦合，并增加了Ti离子的偏离中心位移，从而提高了铁电居里温度。Ti位点的这种双重功能也预示了Eu0.5Ba0.5TiO3-\delta中存在磁电耦合。
引用
@article{arxiv.1708.08235,
title = {Manipulating Multiple Order Parameters via Oxygen Vacancies: The case of Eu0.5Ba0.5TiO3-{\delta}},
author = {Weiwei Li and Qian He and Le Wang and Huizhong Zeng and John Bowlan and Langsheng Ling and Dmitry A. Yarotski and Wenrui Zhang and Run Zhao and Jiahong Dai and Junxing Gu and Shipeng Shen and Haizhong Guo and Li Pi and Haiyan Wang and Yongqiang Wang and Ivan A. Velasco-Davalos and Yangjiang Wu and Zhijun Hu and Bin Chen and Run-Wei Li and Young Sun and Kuijuan Jin and Yuheng Zhang and Hou-Tong Chen and Sheng Ju and Andreas Ruediger and Daning Shi and Albina Y. Borisevich and Hao Yang},
journal= {arXiv preprint arXiv:1708.08235},
year = {2017}
}
备注
Accepted by Physical Review B, 2017