Master of Science (MS)
Physics and Astronomy
First Committee Member
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This work combines high pressure synchrotron X-ray diffraction (XRD), nuclear forward scattering (NFS), and nuclear resonant inelastic X-ray scattering (NRIXS) experiments on iron diantimonide (FeSb2), a promising thermoelectric material. NRIXS uses the interaction between excited nuclear and lattice states to directly measure the phonon density of states (PDOS) for samples containing certain Mössbauer isotopes. For our experiments, we synthesized FeSb2 enriched with the isotope 57Fe and measured the partial PDOS for 57Fe sites in the FeSb2 lattice. NFS, also known as synchrotron Mössbauer spectroscopy, is a sister technique to NRIXS that studies the hyperfine structure of the excited Mössbauer nuclei. High pressure XRD experiments provide complementary information on the crystal structure of FeSb2. Samples were pressurized with symmetric-style and panoramic-style diamond anvil cells. High pressure experiments were conducted at Sector 16 of the Argonne National Laboratory Advanced Photon Source.
High pressure synchrotron X-ray diffraction (XRD); Nuclear forward scattering (NFS); Nuclear resonant inelastic X-ray scattering (NRIXS)
Condensed Matter Physics
University of Nevada, Las Vegas
White, Melanie Alden, "High Pressure Synchrotron XRD, NFS, and NRIXS studies of FeSb2" (2020). UNLV Theses, Dissertations, Professional Papers, and Capstones. 4032.
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