Origins of colossal magnetoresistance in perovskite-type manganese oxides (invited)

Journal Article · Sun Mar 31 23:00:00 EST 1996 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.361353· OSTI ID:280046

Tokura, Y ^[1]; Tomioka, Y; Kuwahara, H; Asamitsu, A; Moritomo, Y; Kasai, M ^[1]

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1. 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--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 79; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM OXIDES
ELECTRONIC STRUCTURE
LANTHANUM OXIDES
MAGNETIC MATERIALS
MAGNETIC-PHASE TRANSFORMATIONS
MAGNETORESISTANCE
MANGANESE OXIDES
METAL-INSULATOR TRANSFORMATIONS
MONOCRYSTALS
PHASE DIAGRAMS
PRASEODYMIUM OXIDES
STRONTIUM OXIDES