Origin of colossal magnetoresistance in LaMnO<sub>3</sub> manganite [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2015. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 10,869-10,872 : digital, PDF file
- Additional Creators:
- University of Missouri--Columbia, United States. Department of Energy. Office of Basic Energy Sciences, European Union, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Phase separation is a crucial ingredient of the physics of manganites; however, the role of mixed phases in the development of the colossal magnetoresistance (CMR) phenomenon still needs to be clarified. In this paper, we report the realization of CMR in a single-valent LaMnO<sub>3</sub> manganite. We found that the insulator-to-metal transition at 32 GPa is well described using the percolation theory. Pressure induces phase separation, and the CMR takes place at the percolation threshold. A large memory effect is observed together with the CMR, suggesting the presence of magnetic clusters. The phase separation scenario is well reproduced, solving a model Hamiltonian. Finally, our results demonstrate in a clean way that phase separation is at the origin of CMR in LaMnO<sub>3</sub>.
- Published through SciTech Connect., 08/13/2015., Proceedings of the National Academy of Sciences of the United States of America 112 35 ISSN 0027-8424 AM, Maria Baldini; Takaki Muramatsu; Mohammad Sherafati; Ho-kwang Mao; Lorenzo Malavasi; Paolo Postorino; Sashi Satpathy; Viktor V. Struzhkin., and Carnegie Inst. of Washington, Washington, DC (United States)
- Funding Information:
- SC0001057, FG02-00ER45818, and 604391
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