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

Description/Abstract

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}.

Authors: Liu, J.Z.; Chang, I.C.; Irons, S.; Klavins, P.; Shelton, R.N. [Physics Department, University of California, Davis, California 95616 (United States)]; Song, K.; Wasserman, S.R. [Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)]
Publication Date:1995 Jun 05
OSTI Identifier: 64847
DOE Contract Number:W-31109-ENG-38
Resource Type:Journal Article
Resource Relation:Journal Name: Applied Physics Letters; Journal Volume: 66; Journal Issue: 23; Other Information: PBD: 5 Jun 1995
Research Org:Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:United States
Language:English
Format: Size: pp. 3218-3220
Other Number(s):Journal ID: APPLAB; ISSN 0003-6951; TRN: TRN: 9511M0055
Subject:36 MATERIALS SCIENCE; LANTHANUM OXIDES; MAGNETORESISTANCE; LEAD OXIDES; CALCIUM OXIDES; MANGANESE OXIDES; FERROMAGNETISM; PARAMAGNETISM; PHASE TRANSFORMATIONS; TEMPERATURE DEPENDENCE; MONOCRYSTALS; FILMS; PEROVSKITES
Update Date:2009 Dec 16

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