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Optical Characterization Of Magnetism In Magnetic/Nonmagnetic Heterostructures, Yichun Fan
Optical Characterization Of Magnetism In Magnetic/Nonmagnetic Heterostructures, Yichun Fan
Dissertations, Theses, and Masters Projects
This thesis focuses on the study of the static and dynamic magnetic interactions in ferromagnetic/nonmagnetic heterostructures using interface-specific and time-resolved optical techniques. The goal of this thesis is to elucidate the interface exchange coupling, magnetic anisotropy, and coherent spin dynamics in these advanced material systems, crucial to the realization of high performance spintronic devices.;First, a pronounced exchange bias (EB) phenomenon is observed in Fe/MgO (001) by magnetic second harmonic generation. The bulk magnetization does not, in marked contrast to typical systems where EB is manifested only in the net magnetization. The magnitude of the exchange bias varies with interface oxygen …