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Article: Current-sensitive electroresistance and the response to a magnetic field in La0.8Ca0.2MnO3 epitaxial thin films

TitleCurrent-sensitive electroresistance and the response to a magnetic field in La0.8Ca0.2MnO3 epitaxial thin films
Authors
KeywordsPhysics engineering
Issue Date2005
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
Citation
Journal of Applied Physics, 2005, v. 97 n. 10, article no. 10H706, p. 1-3 How to Cite?
AbstractThe influence of a transport dc current on the resistivity of La0.8Ca0.2MnO3 epitaxial thin films and their response to a magnetic field has been investigated. We found that when the applied dc current exceeds a threshold value, the electric resistivity in these films could be significantly enhanced. Such observations are completely repeatable. More attractive is that the enhanced resistance turns out to be sensitive to a weak current in a wide temperature range from 10 to 300 K. Even a very small dc current could remarkably depress the high resistance, showing a colossal electroresistance (ER) effect. ER reaches ~1175% at temperatures lower than ~50 K, and ~705% at 300 K for a current changing from 0.72 to 10.5 µA. A highly nonlinear behavior of the I–V curves persists even to room temperature. Significant influence of the magnetic field on the electric transports was also observed. It is found that a low field of 0.25 T could remarkably affect the I–V curves, resulting in a considerable magnetoresistance (MR). ©2005 American Institute of Physics.
Persistent Identifierhttp://hdl.handle.net/10722/42432
ISSN
2023 Impact Factor: 2.7
2023 SCImago Journal Rankings: 0.649
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGao, Jen_HK
dc.contributor.authorHu, FXen_HK
dc.date.accessioned2007-01-29T08:49:56Z-
dc.date.available2007-01-29T08:49:56Z-
dc.date.issued2005en_HK
dc.identifier.citationJournal of Applied Physics, 2005, v. 97 n. 10, article no. 10H706, p. 1-3-
dc.identifier.issn0021-8979en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42432-
dc.description.abstractThe influence of a transport dc current on the resistivity of La0.8Ca0.2MnO3 epitaxial thin films and their response to a magnetic field has been investigated. We found that when the applied dc current exceeds a threshold value, the electric resistivity in these films could be significantly enhanced. Such observations are completely repeatable. More attractive is that the enhanced resistance turns out to be sensitive to a weak current in a wide temperature range from 10 to 300 K. Even a very small dc current could remarkably depress the high resistance, showing a colossal electroresistance (ER) effect. ER reaches ~1175% at temperatures lower than ~50 K, and ~705% at 300 K for a current changing from 0.72 to 10.5 µA. A highly nonlinear behavior of the I–V curves persists even to room temperature. Significant influence of the magnetic field on the electric transports was also observed. It is found that a low field of 0.25 T could remarkably affect the I–V curves, resulting in a considerable magnetoresistance (MR). ©2005 American Institute of Physics.en_HK
dc.format.extent60782 bytes-
dc.format.extent28672 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jspen_HK
dc.relation.ispartofJournal of Applied Physics-
dc.rightsCopyright 2005 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics, 2005, v. 97 n. 10, article no. 10H706, p. 1-3 and may be found at https://doi.org/10.1063/1.1847092-
dc.subjectPhysics engineeringen_HK
dc.titleCurrent-sensitive electroresistance and the response to a magnetic field in La0.8Ca0.2MnO3 epitaxial thin filmsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0021-8979&volume=97&issue=10&spage=10H706:1&epage=3&date=2005&atitle=Current-sensitive+electroresistance+and+the+response+to+a+magnetic+field+in+La0.8Ca0.2MnO3+epitaxial+thin+filmsen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1063/1.1847092en_HK
dc.identifier.scopuseid_2-s2.0-20944443056-
dc.identifier.hkuros103954-
dc.identifier.volume97-
dc.identifier.issue10-
dc.identifier.spagearticle no. 10H706, p. 1-
dc.identifier.epagearticle no. 10H706, p. 3-
dc.identifier.isiWOS:000230168500009-
dc.identifier.issnl0021-8979-

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