Critical change of magnetoresistance with bandwidth and doping in perovskite manganites

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.119248· OSTI ID:531695

Tomioka, Y; Kuwahara, H; Asamitsu, A; Kasai, M ^[1]; Tokura, Y ^[2]

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1. Joint Research Center for Atom Technology (JRCAT), Tsukuba 305 (Japan)
2. Department of Applied Physics, University of Tokyo, Tokyo 113 (Japan)

To explore the optimized colossal magnetoresistance (MR), i.e., higher MR with lower field, magnetotransport properties of single-crystalline perovskite manganites have systematically been investigated. Near x=1/2 with intrinsic instability of charge ordering (a 1/1 ordering of Mn{sup 3+}/Mn{sup 4+}), the one-electron bandwidth (W) is varied by reducing the radius of R-site cation in R{sub 1{minus}x}Sr{sub x}MnO{sub 3}. For R=Nd, the MR behavior is rather canonical, while for R=Sm, the field-induced nonmetal-to-metal transition of the first order shows up accompanying a change in resistivity by several orders of magnitude as a result of an enhanced antiferromagnetic interaction. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 531695
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 70; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL DOPING
CURIE POINT
FERROMAGNETIC MATERIALS
MAGNETORESISTANCE
MANGANESE OXIDES
NEODYMIUM COMPOUNDS
PEROVSKITES
PHASE TRANSFORMATIONS
RARE EARTH COMPOUNDS
SAMARIUM COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES