期刊
PHYSICAL REVIEW B
卷 93, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.035111
关键词
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资金
- National Basic Research Program of China (973 Program) [2013CB932901, 2014CB921104]
- National Natural Science Foundation of China [91121002, 11274071, 11504053, 11274060]
- Shanghai Municipal Natural Science Foundation [14JC1400500]
Manganites are known to often show colossal electroresistance (CER) in addition to colossal magnetoresistance. The (La1-yPry)(1-x)CaxMnO3 (LPCMO) system has a peculiar CER behavior in that little change of magnetization occurs. We use a magnetic force microscope to uncover the CER mechanism in the LPCMO system. In contrast to the previous belief that current reshapes the ferromagnetic metallic (FMM) domains, we show that the shape of the FMM domains remain virtually unchanged after passing electric current. Instead, it is the appearance of a tiny fraction of FMM bridges that is responsible for the CER behavior.
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