完整後設資料紀錄
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dc.contributor.authorJian, Wen-Binen_US
dc.contributor.authorChen, I-Janen_US
dc.contributor.authorLiao, Tai-Chingen_US
dc.contributor.authorOu, Yi-Chingen_US
dc.contributor.authorNien, Cheng-Hsunen_US
dc.contributor.authorWu, Zhong-Yien_US
dc.contributor.authorChen, Fu-Rongen_US
dc.contributor.authorKai, Ji-Jungen_US
dc.contributor.authorLin, Juhn-Jongen_US
dc.date.accessioned2014-12-08T15:12:43Z-
dc.date.available2014-12-08T15:12:43Z-
dc.date.issued2008-01-01en_US
dc.identifier.issn1533-4880en_US
dc.identifier.urihttp://dx.doi.org/10.1166/jnn.2008.N13en_US
dc.identifier.urihttp://hdl.handle.net/11536/9788-
dc.description.abstractDiameter controllable ZnO nanowires have been fabricated by thermal evaporation (vapor transport) with various sizes of gold nanoparticles as catalysts. Diluted magnetic semiconductor (DMS) Zn(1-x)Co(x)O nanowires were then made by high energy Co ion implantation. The as-implanted and the argon-annealed Zn(1-x)Co(x)O nanowires displayed weak ferromagnetism while the high-vacuum annealed nanowires exhibited strong ferromagnetic ordering at room temperature. Size dependent behavior has been observed in the magnetic field and temperature dependences of magnetization. The shrinkage of the nanowire diameter reduced the spontaneous magnetization as well as the hysteresis loops. Field cooled and zero-field cooled magnetization and coercivity measurements were performed between 2 and 300 K to study the evolution of magnetism from the weak to the strong ferromagnetic states. In particular, superparamagnetic features were observed and shown to be intrinsic characteristics of the DMS Zn(1-x)Co(x)O nanowires. The room-temperature spontaneous magnetization of individual Zn(1-x)Co(x)O nanowires was also established by using magnetic force microscope measurements.en_US
dc.language.isoen_USen_US
dc.subjectdiluted magnetic semiconductoren_US
dc.subjectZnCoOen_US
dc.subjectnanowiresen_US
dc.subjectsize effecten_US
dc.subjectferromagnetismen_US
dc.titleSize dependent magnetization and high-vacuum annealing enhanced ferromagnetism in Zn(1-x)Co(x)O nanowiresen_US
dc.typeArticleen_US
dc.identifier.doi10.1166/jnn.2008.N13en_US
dc.identifier.journalJOURNAL OF NANOSCIENCE AND NANOTECHNOLOGYen_US
dc.citation.volume8en_US
dc.citation.issue1en_US
dc.citation.spage202en_US
dc.citation.epage211en_US
dc.contributor.department電子物理學系zh_TW
dc.contributor.department物理研究所zh_TW
dc.contributor.departmentDepartment of Electrophysicsen_US
dc.contributor.departmentInstitute of Physicsen_US
dc.identifier.wosnumberWOS:000253339800011-
dc.citation.woscount7-
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