Visualizing ferromagnetic domains in magnetic topological insulators
Visualizing ferromagnetic domains in magnetic topological insulators
复制标题
磁拓扑绝缘体中铁磁畴的可视化
DOI:
10.1063/1.4921093
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发表时间:
2015-05
期刊:
影响因子:
6.1
通讯作者:
Wu Weida
中科院分区:
文献类型:
--
作者:
Wang Wenbo;Yang Fang;Gao Chunlei;Jia Jinfeng;Gu G. D.;Wu Weida
We report a systematic study of ferromagnetic domains in both single-crystal and thin-film specimens of magnetic topological insulators Cr doped (Bi0.1Sb0.9)2Te3 using magnetic force microscopy (MFM). The temperature and field dependences of MFM and in situ resistance data are consistent with previous bulk transport and magnetic characterization. Bubble-like ferromagnetic domains were observed in both single crystals and thin films. Significantly, smaller domain size (∼500 nm) with narrower domain wall (∼150 − 300 nm) was observed in thin films of magnetic topological insulators, likely due to vertical confinement effect. These results suggest that thin films are more promising for visualization of chiral edge states.
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