Article: Suppression of photoconductivity by magnetic field in epitaxial manganite thin films

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TitleSuppression of photoconductivity by magnetic field in epitaxial manganite thin films
AuthorsGuo, EJ2
Wang, L2
Lu, HB2
Guo, HZ2
He, M2
Jin, KJ2
Yang, GZ2
Gao, J1
KeywordsColossal magnetoresistance materials
External fields
Low temperatures
Majority carriers
Manganite films
Issue Date2012
PublisherAmerican Institute of Physics. The Journal's web site is located at http://apl.aip.org/
CitationApplied Physics Letters, 2012, v. 100 n. 6 [How to Cite?]
DOI: http://dx.doi.org/10.1063/1.3683551
AbstractThe erasure of photoinduced resistance (PR) by the magnetic field was investigated in manganite films. The PR was significantly suppressed when a magnetic field was introduced at low temperature. The decrease (or increase) of PR with increment of magnetic field was observed in ferromagnetic (or paramagnetic) phases of films, respectively. Our results are suggested to be the coaction of two effects under magnetic fields: (i) the reorientation of domains and spin directions of photoexcited carriers and (ii) electrons trapped around oxygen vacancies released and recombined with majority carriers in films. The interplay of the external fields is a good demonstration of the strong coupling between spins and charges in colossal magnetoresistance materials. © 2012 American Institute of Physics.
ISSN0003-6951
2011 Impact Factor: 3.844
2011 SCImago Journal Rankings: 0.398
DOIhttp://dx.doi.org/10.1063/1.3683551
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorGuo, EJ
dc.contributor.authorWang, L
dc.contributor.authorLu, HB
dc.contributor.authorGuo, HZ
dc.contributor.authorHe, M
dc.contributor.authorJin, KJ
dc.contributor.authorYang, GZ
dc.contributor.authorGao, J
dc.date.accessioned2012-04-24T07:52:13Z
dc.date.available2012-04-24T07:52:13Z
dc.date.issued2012
dc.description.abstractThe erasure of photoinduced resistance (PR) by the magnetic field was investigated in manganite films. The PR was significantly suppressed when a magnetic field was introduced at low temperature. The decrease (or increase) of PR with increment of magnetic field was observed in ferromagnetic (or paramagnetic) phases of films, respectively. Our results are suggested to be the coaction of two effects under magnetic fields: (i) the reorientation of domains and spin directions of photoexcited carriers and (ii) electrons trapped around oxygen vacancies released and recombined with majority carriers in films. The interplay of the external fields is a good demonstration of the strong coupling between spins and charges in colossal magnetoresistance materials. © 2012 American Institute of Physics.
dc.description.naturepublished_or_final_version
dc.identifier.citationApplied Physics Letters, 2012, v. 100 n. 6 [How to Cite?]
DOI: http://dx.doi.org/10.1063/1.3683551
dc.identifier.doihttp://dx.doi.org/10.1063/1.3683551
dc.identifier.hkuros199348
dc.identifier.isiWOS:000300214000031
Funding AgencyGrant Number
National Natural Science Foundation of China
National Basic Research Program of China
Research Grant Council of Hong KongHKU702409P
URC of the University of Hong Kong
Funding Information:

This work has been supported by the National Natural Science Foundation of China and the National Basic Research Program of China, and also granted by a grant of the Research Grant Council of Hong Kong (Project No. HKU702409P), the URC of the University of Hong Kong.

dc.identifier.issn0003-6951
2011 Impact Factor: 3.844
2011 SCImago Journal Rankings: 0.398
dc.identifier.issue6
dc.identifier.scopuseid_2-s2.0-84863162779
dc.identifier.urihttp://hdl.handle.net/10722/146410
dc.identifier.volume100
dc.languageeng
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://apl.aip.org/
dc.publisher.placeUnited States
dc.relation.ispartofApplied Physics Letters
dc.relation.referencesReferences in Scopus
dc.rightsApplied Physics Letters. Copyright © American Institute of Physics.
dc.rightsCopyright (2012) 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 (Applied Physics Letters, 2012, v. 100 n. 6, article no. 061902) and may be found at (http://apl.aip.org/resource/1/applab/v100/i6/p061902_s1).
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License
dc.subjectColossal magnetoresistance materials
dc.subjectExternal fields
dc.subjectLow temperatures
dc.subjectMajority carriers
dc.subjectManganite films
dc.titleSuppression of photoconductivity by magnetic field in epitaxial manganite thin films
dc.typeArticle
Author Affiliations
  1. The University of Hong Kong
  2. Chinese Academy of Sciences