Electron irradiation induced room temperature ferromagnetism in single crystal TiO2 substrate
Electron irradiation induced room temperature ferromagnetism in single crystal TiO2 substrate
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DOI：
10.1016/j.ceramint.2023.10.041
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发表时间：
2023-11-10
影响因子：
5.2
通讯作者：
Li，Gongping
中科院分区：
文献类型：
--
作者：
Gao，Xudong;Gu，Liuyang;Li，Gongping
金红石型TiO2在含有本征缺陷或掺杂外部元素时表现出RTFM，这使其成为发展自旋电子学的关键衬底材料。利用电子束辐照，可以在金红石型TiO 2中产生本征缺陷，通过调节电子束的能量和注量可以控制缺陷的类型和浓度。在这项研究中，金红石型二氧化钛样品进行了电子辐照在不同的能量密度，并产生的微观结构，磁性和光学性能进行了表征。结果表明，所有样品均表现出RTFM，MS和NS随V O浓度的变化规律相似。这直接证明了金红石型TiO2中的本征缺陷可以诱发RTFM，并证实了电子辐照可以调节金红石型TiO2的RTFM。
Rutile TiO 2 exhibits RTFM when it contains intrinsic defects or when external elements are doped into the material, which makes it an crucial substrate material for advancement of spintronics. By utilizing electron irradiation, intrinsic defects can be generated in rutile TiO 2, and the type and concentration of defects can be controlled by adjusting the energy and fluence of the electron beam. In this study, rutile TiO 2 samples were subjected to electron irradiation at different fluences, and the resulting microstructure, magnetism, and optical properties were characterized. The findings reveal that all the samples exhibit RTFM, and the changes of M S and N S are similar with the variations of the concentration of V O. This serves as direct evidence that the intrinsic defects in rutile TiO 2 can induce RTFM and confirms that electron irradiation can regulate the RTFM of rutile TiO 2.