Theory of elastic x-ray resonant exchange scattering in lanthanides and actinides

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dc.contributor.advisorTrammell, George T.
dc.creatorHamrick, Michael David
dc.date.accessioned2009-06-03T23:55:44Z
dc.date.available2009-06-03T23:55:44Z
dc.date.issued1990
dc.description.abstractResonant X-ray scattering has been observed in lanthanides and actinides. The observed scattering is sensitive to magnetization, but it arises primarily from electric, rather than magnetic, multipole transitions. The magnetic sensitivity is due to "exchange" effects and to spin-orbit correlations in one or both of the levels involved in the resonance. "Exchange" effects include the exclusion principle, which permits transitions only to vacant orbitals in partially filled shells, and exchange splitting in band states. The elastic scattering amplitude contains terms dependent on the direction of the magnetic moment up to quadratic order for E1 transitions and up to quartic order for E2 transitions. In coherent scattering of X-rays from spiral antiferromagnets, the magnetic sensitivity results in the formation of resonant magnetic satellites associated with the Bragg peaks. This effect provides a new type of probe for the investigation of magnetic structures.
dc.format.extent131 p.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.callnoThesis Phys. 1990 Hamrick
dc.identifier.citationHamrick, Michael David. "Theory of elastic x-ray resonant exchange scattering in lanthanides and actinides." (1990) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/13437">https://hdl.handle.net/1911/13437</a>.
dc.identifier.urihttps://hdl.handle.net/1911/13437
dc.language.isoeng
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.
dc.subjectCondensed matter physics
dc.titleTheory of elastic x-ray resonant exchange scattering in lanthanides and actinides
dc.typeThesis
dc.type.materialText
thesis.degree.departmentPhysics
thesis.degree.disciplineNatural Sciences
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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