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Article: Unusual current-induced electroresistance in epitaxial thin films of La0.8Ca0.2MnO3

TitleUnusual current-induced electroresistance in epitaxial thin films of La0.8Ca0.2MnO3
Authors
KeywordsPhysics
Issue Date2004
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter and Materials Physics), 2004, v. 69 n. 21, p. 212413:1-4 How to Cite?
AbstractThe transport behavior of La0.8Ca0.2MnO3 thin films with Curie temperature TC at ~286 K has been investigated under various applied currents in the absence of magnetic field. An unusual current-induced electroresistance (ER) was observed. When the applied current density reaches a critical value, the films could not revert to the initial state. A novel state can be induced by a suitable large current, in which the insulation-metal transition temperature remains almost unchanged comparing with the initial state, whereas the value of the peak resistance is very sensitive to the applied current. Even a rather low current density can depress it significantly. ER reaches ~43% under a small current of 0.5 mA (density ~1×104 A cm–2). The observed ER effect seems to favor a percolative phase separation picture.
Persistent Identifierhttp://hdl.handle.net/10722/43455
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHu, FXen_HK
dc.contributor.authorGao, Jen_HK
dc.date.accessioned2007-03-23T04:46:02Z-
dc.date.available2007-03-23T04:46:02Z-
dc.date.issued2004en_HK
dc.identifier.citationPhysical Review B (Condensed Matter and Materials Physics), 2004, v. 69 n. 21, p. 212413:1-4en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43455-
dc.description.abstractThe transport behavior of La0.8Ca0.2MnO3 thin films with Curie temperature TC at ~286 K has been investigated under various applied currents in the absence of magnetic field. An unusual current-induced electroresistance (ER) was observed. When the applied current density reaches a critical value, the films could not revert to the initial state. A novel state can be induced by a suitable large current, in which the insulation-metal transition temperature remains almost unchanged comparing with the initial state, whereas the value of the peak resistance is very sensitive to the applied current. Even a rather low current density can depress it significantly. ER reaches ~43% under a small current of 0.5 mA (density ~1×104 A cm–2). The observed ER effect seems to favor a percolative phase separation picture.en_HK
dc.format.extent59639 bytes-
dc.format.extent30720 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.subjectPhysicsen_HK
dc.titleUnusual current-induced electroresistance in epitaxial thin films of La0.8Ca0.2MnO3en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=69&issue=21&spage=212413:1&epage=4&date=2004&atitle=Unusual+current-induced+electroresistance+in+epitaxial+thin+films+of+La0.8Ca0.2MnO3en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.69.212413en_HK
dc.identifier.scopuseid_2-s2.0-42749103270-
dc.identifier.hkuros97385-
dc.identifier.isiWOS:000222530200021-

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