X-ray studies of magnetism in the 3-d transition metals : from the nanoscale to the ultrafast to the nonlinear limit
- Resonant X-Ray phenomena associated with electronic core-to-valence transitions have provided a wealth of information on modern magnetic nanostructures. In this thesis, we will describe two sets of experiments, both focusing on a different measurement related to the magnetic properties of the 3d transition metals, and both showcasing different advantages of modern X-Ray sources. We will show how large polarization-dependent resonant effects allow the determination of weak element-specific static and transient magnetic moments and also offer the capability of recording movies of nanoscale magnetization dynamics with femtosecond temporal resolution. We demonstrate such effects with sensitive spectroscopic measurements of magnetism in Co/Cu alloys and of spin injection studies in Cu. In the next set of experiments, we show that when such techniques are extended to higher intensities at X-Ray free electron lasers, they also reveal completely new non-linear effects, which are especially pronounced when probing spin-dependent effects. We will demonstrate how these non-linear effects dramatically alter both magnetic diffraction and elastic transmission through a magnetically-patterned solid Co sample. Together, these studies show both the exceptional current capabilities of X-Ray in studies of 3-d magnetism, but also the potential for studying interesting nonlinear phenomena in solids as brighter X-Ray sources become available in the future.
|Type of resource
|electronic; electronic resource; remote
|1 online resource.
|Stanford University, Department of Physics.
|Bucksbaum, Philip H
|Bucksbaum, Philip H
|Statement of responsibility
|Submitted to the Department of Physics.
|Thesis (Ph.D.)--Stanford University, 2017.
- © 2017 by Zhao Chen
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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