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Ferromagnetism in inhomogeneous Zn1−xCoxOZn1−xCoxO thin films

dc.contributor.authorTay, Maureenen_US
dc.contributor.authorWu, Yihongen_US
dc.contributor.authorHan, Gu Changen_US
dc.contributor.authorChong, Tow Chongen_US
dc.contributor.authorZheng, Yuan Kaien_US
dc.contributor.authorWang, Shi Jieen_US
dc.contributor.authorChen, Yanbinen_US
dc.contributor.authorPan, Xiaoqingen_US
dc.date.accessioned2011-11-15T16:07:33Z
dc.date.available2011-11-15T16:07:33Z
dc.date.issued2006-09-15en_US
dc.identifier.citationTay, Maureen; Wu, Yihong; Han, Gu Chang; Chong, Tow Chong; Zheng, Yuan Kai; Wang, Shi Jie; Chen, Yanbin; Pan, Xiaoqing (2006). "Ferromagnetism in inhomogeneous Zn1−xCoxOZn1−xCoxO thin films." Journal of Applied Physics 100(6): 063910-063910-9. <http://hdl.handle.net/2027.42/87733>en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/87733
dc.description.abstractWe report on a systematic study of structural, optical, electrical, and magnetic properties of Zn1−xCoxOZn1−xCoxO (x = 0.05–0.29)(x=0.05–0.29) thin films codoped with Al (<0.1%)(<0.1%). Both codoped (in which Co is cosputtered with other elements) and δδ-doped (in which Co is doped digitally in the host matrix) samples have been prepared and studied. Prior to doping of Co, growth conditions were optimized to produce ZnO:Al films with a resistivity of about 1.3 mΩ cm1.3mΩcm. Although all the films with xx in the range of 0.05–0.29 showed clear hysteresis at room temperature in magnetometry measurement and absorption peaks associated with the d-dd-d transitions of Co2+Co2+ ions, only the most heavily doped samples have shown clear anomalous Hall effect. The latter also showed strong, but photon energy dependent, magnetic circular dichroism and negative magnetoresistance at room temperature. These results in combination with detailed structural analysis by transmission electron microscope and x-ray diffraction study revealed that the ferromagnetic properties of Zn1−xCoxOZn1−xCoxO were mostly originated from secondary phases and Co precipitates. The influence of inhomogeneity on the interpretation of various measurement results is also discussed.en_US
dc.publisherThe American Institute of Physicsen_US
dc.rights© The American Institute of Physicsen_US
dc.titleFerromagnetism in inhomogeneous Zn1−xCoxOZn1−xCoxO thin filmsen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelPhysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Materials Science and Engineering, University of Michigan, H. H. Dow Building, 2300 Hayward Street, Ann Arbor, Michigan 48109-2136en_US
dc.contributor.affiliationotherDepartment of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore and Data Storage Institute, 5 Engineering Drive 1, Singapore 117608, Singaporeen_US
dc.contributor.affiliationotherDepartment of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singaporeen_US
dc.contributor.affiliationotherData Storage Institute, 5 Engineering Drive 1, Singapore 117608, Singaporeen_US
dc.contributor.affiliationotherInstitute of Materials Research and Engineering (IMRE), 3 Research Link, Singapore 117602, Singaporeen_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/87733/2/063910_1.pdf
dc.identifier.doi10.1063/1.2348632en_US
dc.identifier.sourceJournal of Applied Physicsen_US
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dc.owningcollnamePhysics, Department of


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