Magneto-optical Kerr effect and magnetic circular dichroism in ferromagnetic indium-manganese-arsenic/gallium-antimony heterostructures

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dc.contributor.advisorKono, Junichiroen_US
dc.creatorWang, Jigangen_US
dc.date.accessioned2009-06-04T08:07:29Zen_US
dc.date.available2009-06-04T08:07:29Zen_US
dc.date.issued2002en_US
dc.description.abstractThis thesis describes a Magneto-Optical Kerr Effect (MOKE) and Magnetic Circular Dichroism (MCD) study of ferromagnetism in III-V magnetic semiconductor heterostructures. This work was initiated due to the much recent interest in spin-related phenomena in semiconductors. The discovery of carrier/light-induced ferromagnetism in InMnAs-based heterostructures has opened up new possibilities for spin-based multifunctional devices that will integrate photonics, magnetics and microelectronics. However, an experimental demonstration of direct ultrafast optical manipulation of spins/magnetic order in this system has not been reported, although it is considered to be a crucial step towards pico- or femto-second operation of information encoded in the spin degree of freedom. In addition, the origin of ferromagnetism is still a subject of debate. To address these issues, we have developed an experimental setup for performing continuous-wave (CW) and time-resolved light-induced MOKE/MCD experiments. Our data clearly demonstrate that magnetic properties, e.g., coercivity and remanent magnetization, can be optically controlled in an ultrafast manner (∼ ps). The experimental results of CW and two-color time-resolved MOKE/MCD measurements are presented. Finally, the mechanism of the ultrafast MOKE response is discussed in terms of transient photo/carrier-induced modifications of exchange interaction and domain wall energy.en_US
dc.format.extent81 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS E.E. 2002 WANGen_US
dc.identifier.citationWang, Jigang. "Magneto-optical Kerr effect and magnetic circular dichroism in ferromagnetic indium-manganese-arsenic/gallium-antimony heterostructures." (2002) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/17557">https://hdl.handle.net/1911/17557</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/17557en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectElectronicsen_US
dc.subjectElectrical engineeringen_US
dc.subjectCondensed matter physicsen_US
dc.subjectOpticsen_US
dc.titleMagneto-optical Kerr effect and magnetic circular dichroism in ferromagnetic indium-manganese-arsenic/gallium-antimony heterostructuresen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentElectrical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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