Giant magnetoresistance at 300 K in single crystals of La{sub 0.65}(PbCa){sub 0.35}MnO{sub 3}

Journal Article · Mon Jun 05 04:00:00 EDT 1995 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.113728· OSTI ID:64847

Liu, J Z; Chang, I C; Irons, S; Klavins, P; Shelton, R N ^[1]; Song, K; Wasserman, S R ^[2]

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1. Physics Department, University of California, Davis, California 95616 (United States)
2. Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Giant magnetoresistance (GMR) at 300 K and 5.5 T with {Delta}{ital R}/{ital R}(0)=74% was observed in single crystals of La{sub 0.65}(PbCa){sub 0.35}MnO{sub 3}. The maximum GMR occurs exactly at the ferromagnetic--paramagnetic phase transition temperature ({ital T}{sub {ital c}}). For {ital T}{lt}{ital T}{sub {ital c}}, the {ital R}({ital T}) curve is closely related to the {ital M}({ital T}) curve. A sign change in the curvatures of {ital R}({ital H}) curves below and above {ital T}{sub {ital c}} has been observed, indicating that two different mechanisms are responsible for the magnetic scatterings of the carriers in two separate temperature regions. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 64847
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 23 Vol. 66; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM OXIDES
FERROMAGNETISM
FILMS
LANTHANUM OXIDES
LEAD OXIDES
MAGNETORESISTANCE
MANGANESE OXIDES
MONOCRYSTALS
PARAMAGNETISM
PEROVSKITES
PHASE TRANSFORMATIONS
TEMPERATURE DEPENDENCE