Origin of room-temperature ferromagnetism in Co-doped CeO2

被引：4
|
作者：
Tarui, Kenji [1 ]
Oomori, Tomohiro [1 ]
Ito, Yuya [1 ]
Yamamoto, Tomoyuki [1 ,2 ,3 ]
机构：
[1] Waseda Univ, Fac Sci & Engn, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan
[2] Kagami Mem Res Inst Mat Sci & Technol, Shinjuku Ku, 2-8-26 Nishiwaseda, Tokyo 1690051, Japan
[3] Waseda Univ, Inst Condensed Matter Sci, Shinjuku Ku, 3-4-1 Okubo, Tokyo 1698555, Japan
来源：
PHYSICA B-CONDENSED MATTER | 2021年 / 619卷
关键词：
Dilute magnetic material; Co; X-ray absorption near-edge structure; CeO2;
D O I：
10.1016/j.physb.2021.413158
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Co-doped CeO2 fabricated using the conventional solid-state reaction method demonstrates ferromagnetism at room temperature (RT). To investigate the origin of ferromagnetism at RT, powder X-ray diffraction analysis is first performed, in which pattern changes due to Co doping are not indicated. Subsequently, local environment analysis is carried out using X-ray absorption near-edge structure (XANES) measurements at the Co K-edge, demonstrating the metallic valence state of Co. Hence, it is confirmed that Co exists as nanosized small particles in CeO2, which demonstrates ferromagnetism at RT.
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页数：5
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