期刊
APPLIED PHYSICS LETTERS
卷 95, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3241997
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资金
- Natural Science Foundation of China [50601013, 50832002]
- National Key Projects for Basic Research of China [2006CB921802, 2009CB623303]
- 111 Programme of MOE of China [B07026]
The reversible resistance switching (RS) controlled by current pulse pairs, accompanied with an overshooting relaxation, is observed in bulk La0.225Pr0.4Ca0.375MnO3. We demonstrate that the reversible RS effect is not the result of current-induced intrinsic transition of charge-ordered insulator (COI) into ferromagnetic metal (FMM) phase, but the outcome of Joule-heat-assisted transition between the FMM and COI phases. A local thermal-cycle assisted rearrangement of the FMM phase in the COI matrix is controllable by a current pulse, opening a possibility for multistate memory applications. (C) 2009 American Institute of Physics. [doi:10.1063/1.3241997]
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