文章基本信息

标题：Carrier-dependent magnetic anisotropy of cobalt doped titanium dioxide
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作者：Bin Shao ; Min Feng ; Xu Zuo 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep07496
语种：English
出版社：Springer Nature
摘要：Using first-principles calculations, we predict that the magnetic anisotropy energy of Co-doped TiO₂ sensitively depends on carrier accumulation. This magnetoelectric phenomenon provides a potential route to a direct manipulation of the magnetization direction in diluted magnetic semiconductor by external electric-fields. We calculate the band structures and reveal the origin of the carrier-dependent magnetic anisotropy energy in k -space. It is shown that the carrier accumulation shifts the Fermi energy, and consequently, regulates the competing contributions to the magnetic anisotropy energy. The calculations provide an insight to understanding this magnetoelectric phenomenon, and a straightforward way to search prospective materials for electrically controllable spin direction of carriers.