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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, EJ1
Wang, L1
Lu, HB1
Guo, HZ1
He, M1
Jin, KJ1
Yang, GZ1
Gao, J2
 
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
2012 Impact Factor: 3.794
2012 SCImago Journal Rankings: 1.938
 
DOIhttp://dx.doi.org/10.1063/1.3683551
 
ISI Accession Number IDWOS: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.

 
ReferencesReferences in Scopus
 
DC FieldValue
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
2012 Impact Factor: 3.794
2012 SCImago Journal Rankings: 1.938
 
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
 
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<description.abstract>The 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. &#169; 2012 American Institute of Physics.</description.abstract>
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Author Affiliations
  1. Institute of Physics Chinese Academy of Sciences
  2. The University of Hong Kong