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postgraduate thesis: Magnetic circular dichroism and Hall measurement of cobalt-doped zinc oxide thin films

TitleMagnetic circular dichroism and Hall measurement of cobalt-doped zinc oxide thin films
Authors
Advisors
Advisor(s):Cui, X
Issue Date2012
PublisherThe University of Hong Kong (Pokfulam, Hong Kong)
Citation
Deng, Y. [邓远源]. (2012). Magnetic circular dichroism and Hall measurement of cobalt-doped zinc oxide thin films. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5043449
AbstractThe observation of ferromagnetism of (Ga,Mn)As by Ohno in 1998 has inspired great interest in diluted magnetic semiconductors (DMS). DMS’s features combining ferromagnetism and semiconducting make them of great potential for conceptual spintronic devices, which is a promising field of research for the emerging electronics. The practical application of DMS requires a Curie temperature well above room temperature and an intrinsic ferromagnetism. There are several types of DMS materials. The typical ones are transition-metal (TM) doped GaAs, GaN and ZnO. The TM-doped ZnO has drawn particular attention due to the observation of room temperature ferromagnetism in this system including cobalt-doped ZnO.But the origin of ferromagnetic TM-doped ZnO is still unknown after a decade’s theoretical and experimental effort on this material. In this thesis, we do the magnetic circular dichroism(MCD) and Hall measurement of high quality Cobalt-doped ZnO thin films grown by molecular beam epitaxy (MBE). Room temperature ferromagnetism is observed in these samples. Combining the data from MCD and Hall measurement, we attribute the room temperature ferromagnetism in this system to the impurity band of the doped Cobalt cations.
DegreeMaster of Philosophy
SubjectCircular dichroism.
Zinc oxide thin films.
Dept/ProgramPhysics
Persistent Identifierhttp://hdl.handle.net/10722/184262

 

DC FieldValueLanguage
dc.contributor.advisorCui, X-
dc.contributor.authorDeng, Yuanyuan.-
dc.contributor.author邓远源.-
dc.date.accessioned2013-06-29T15:46:28Z-
dc.date.available2013-06-29T15:46:28Z-
dc.date.issued2012-
dc.identifier.citationDeng, Y. [邓远源]. (2012). Magnetic circular dichroism and Hall measurement of cobalt-doped zinc oxide thin films. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5043449-
dc.identifier.urihttp://hdl.handle.net/10722/184262-
dc.description.abstractThe observation of ferromagnetism of (Ga,Mn)As by Ohno in 1998 has inspired great interest in diluted magnetic semiconductors (DMS). DMS’s features combining ferromagnetism and semiconducting make them of great potential for conceptual spintronic devices, which is a promising field of research for the emerging electronics. The practical application of DMS requires a Curie temperature well above room temperature and an intrinsic ferromagnetism. There are several types of DMS materials. The typical ones are transition-metal (TM) doped GaAs, GaN and ZnO. The TM-doped ZnO has drawn particular attention due to the observation of room temperature ferromagnetism in this system including cobalt-doped ZnO.But the origin of ferromagnetic TM-doped ZnO is still unknown after a decade’s theoretical and experimental effort on this material. In this thesis, we do the magnetic circular dichroism(MCD) and Hall measurement of high quality Cobalt-doped ZnO thin films grown by molecular beam epitaxy (MBE). Room temperature ferromagnetism is observed in these samples. Combining the data from MCD and Hall measurement, we attribute the room temperature ferromagnetism in this system to the impurity band of the doped Cobalt cations.-
dc.languageeng-
dc.publisherThe University of Hong Kong (Pokfulam, Hong Kong)-
dc.relation.ispartofHKU Theses Online (HKUTO)-
dc.rightsThe author retains all proprietary rights, (such as patent rights) and the right to use in future works.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.source.urihttp://hub.hku.hk/bib/B50434494-
dc.subject.lcshCircular dichroism.-
dc.subject.lcshZinc oxide thin films.-
dc.titleMagnetic circular dichroism and Hall measurement of cobalt-doped zinc oxide thin films-
dc.typePG_Thesis-
dc.identifier.hkulb5043449-
dc.description.thesisnameMaster of Philosophy-
dc.description.thesislevelMaster-
dc.description.thesisdisciplinePhysics-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.5353/th_b5043449-
dc.date.hkucongregation2013-

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