Metal-insulator transition temperature in EuO1−x films as a function of exposure time in air
Metal-insulator transition temperature in EuO1−x films as a function of exposure time in air
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EuO1-x 薄膜中的金属-绝缘体转变温度与空气中暴露时间的函数关系
DOI：
10.1016/j.jmmm.2021.168964
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发表时间：
2022
影响因子：
2.7
通讯作者：
Tang, Jinke
中科院分区：
文献类型：
--
作者：
Shrestha, Narendra;Tang, Jinke
缺氧的EuO_1-−_x在居里温度(TC)附近表现出金属到绝缘体的转变。对EuO_1-−_x薄膜在空气中暴露时间的系统输运研究表明，随着氧空位浓度的降低，薄膜的T_c从140K逐渐下降到70K，这伴随着电阻的急剧增加。我们还发现了输运测量中磁各向异性的异常增强，这是由于薄膜和衬底界面处强烈的自旋-轨道耦合以及EuO_1-−_x中可能存在类似Skyrmions的自旋织构所致。
Oxygen-deficient Europium monoxide EuO1−xshows a metal-to-insulator transition near the Curie temperature (TC). A systematic transport study of EuO1−xthin films as a function of exposure time in air reveals a gradually decreased TCfrom 140 K to 70 K as the concentration of the oxygen vacancies decreases, which is accompanied by a drastic increase in the resistance. We also find an unusual enhancement of magnetic anisotropy in the transport measurements, which results from the strong spin-orbit coupling at the interface between the film and substrate and possible presence of spin-textures like skyrmions in EuO1−x.