Origins of colossal magnetoresistance in perovskite-type manganese oxides (invited)
- Joint Research Center for Atom Technology (JRCAT), Tsukuba 305 (Japan)
Phenomena of colossal magnetoresistance (MR) or magnetic field induced insulator{endash}metal ({ital I}{endash}{ital M}) transitions have been investigated for single crystals of perovskite-type manganese oxides with controlled carrier density and one-electron bandwidth. In addition to the canonical MR behavior near the Curie temperature, the first-order phase transition accompanying several orders of magnitude change in resistivity has been observed under an external magnetic field for many of the composition-controlled crystals as an intrinsic bulk phenomenon. It was proved by the systematic experimental investigations that the field-induced destruction of the charge-ordered state accompanying the lattice structural as well as metamagnetic transition is a major origin of such a colossal MR. Versatile MR phenomena and {ital I}{endash}{ital M} phase diagrams in the {ital T}{endash}{ital H} plane are presented with their interpretation. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 280046
- Report Number(s):
- CONF-951101-; ISSN 0021-8979; TRN: 9608M0101
- Journal Information:
- Journal of Applied Physics, Vol. 79, Issue 8; Conference: 40. conference on magnetism and magnetic materials, Philadelphia, PA (United States), 6-9 Nov 1995; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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