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dc.contributor.advisorLozanne, Alejandro L. deen
dc.creatorHyun, Changbae, 1974-en
dc.date.accessioned2008-08-28T23:58:18Zen
dc.date.available2008-08-28T23:58:18Zen
dc.date.created2007-12en
dc.date.issued2008-08-28T23:58:18Zen
dc.identifier.urihttp://hdl.handle.net/2152/3604en
dc.description.abstractThis dissertation introduces scanning probe microscopy (SPM) and describes the construction and design of a home built low temperature magnetic force microscope (MFM). Then the magnetic coatings on atomic force microscope cantilevers with a focused ion beam (FIB) will be explained. This technique allows the convenient deposition of complex or expensive materials such as CoCrPt. With the MFM tip coated by FIB, the ferromagnetic domain structure of a La[subscript 0.67]Ca[subscript 0.33]MnO₃ film is studied as a function of an in-plane magnetic field below room temperature. Next I will discuss the use of chemically-synthesized FePt nanocrystals as a good candidate for high density storage media. This nanocrystal film showed sintering problems during the annealing process, which is essential to make FePt a hard ferromagnet. A silica overcoating method was used to prevent nanocrystal sintering, which allowed the MFM study of films made from these nanocrystals. I will also discuss resistance measurements of the FePt nanocrystals.en
dc.format.mediumelectronicen
dc.language.isoengen
dc.rightsCopyright © is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.subject.lcshScanning probe microscopyen
dc.subject.lcshNanocrystalsen
dc.titleMagnetic studies of colossal magnetoresistance materials and FePt nanocrystalsen
dc.description.departmentPhysicsen
dc.identifier.oclc194451983en
dc.type.genreThesisen
thesis.degree.departmentPhysicsen
thesis.degree.disciplinePhysicsen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen


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