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The Australian rare earth industry :Matsui, Shinji. Unknown Date (has links)
Thesis (M Bus (Research)) -- University of South Australia, 1992
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Laser Spectroscopy of Eu Centres in MBE Grown CaF₂:Eu-CdF₂ Superlattices and CaF₂:Eu Thin FilmsChoi, Joon Koo January 2009 (has links)
Molecular beam epitaxy (MBE) grown CaF₂-CdF₂ superlattices (SLs) and CaF₂ thin films doped with Eu ions were investigated by laser spectroscopic techniques. Eu ions were selectively doped into CaF₂ layers and were used as an optical probe to the SLs and thin films. Physical properties of the SLs and thin films were inferred from optical transitions of divalent and trivalent Eu centres. The 4ƒ⁶5d → 4ƒ⁷ transition of Eu²⁺ has shown strain dependent peak shifts of the zero phonon line. These shifts were thought to be a result of deformation in the crystal structure primarily due to the lattice mismatch with the Si substrate. Based on the amount of shifts, the strains associated with the MBE samples were calculated. Photoluminescence (PL) bleaching and its recovery of the same transition of Eu²⁺ in SLs were also explored. At low temperature the bleaching is best described as bi-exponential decay. Localisation of the liberated electrons from the 4ƒ⁶5d absorption band was considered for the bleaching effect. It was observed that at elevated temperatures the PL intensity of the 4ƒ⁶5d → 4ƒ⁷ transition was recovered. Combined excitation-emission spectroscopy (CEES) was employed to investigate trivalent Eu centres in SLs. The strong ⁷F₀ → ⁵D₁ excitation and the ⁵D₀ → ⁷F₁ emission of Eu³⁺ were studied. A novel centre, which is assigned as I, of Eu³⁺ in SL was observed and investigated in comparison with the cubic centre (O centre) of Eu³⁺. Relative to the O centre the I centre has shown a strong thickness dependent PL which can be demonstrated with a mono layer (1 ML = 3.15 Å) resolution. Possible transformation of the I centre to the O centre was also observed by additional thermal and UV excitations. The I and the O centres are proposed as the same centre except for having an electron in the vicinity of the I centre.
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Synthesis and characterization of new Lanthanide chalcogenidesJin, Geng Bang, January 2007 (has links) (PDF)
Thesis (Ph.D.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographic references.
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Approaches towards a critical evaluation and update of the red list of South African butterflies /Ball, Jonathan Bradford. January 2006 (has links)
Thesis (MSc)--University of Stellenbosch, 2006. / Bibliography. Also available via the Internet.
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A study of the methods of determination of the rare earth elements in a substance with a high concentration of calcium and phosphates and the application to human bones /Hoover, Roger Kent, January 1951 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute, 1951. / Vita. Includes bibliographical references (leaves 50-54). Also available via the Internet.
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Diffusion of barium atoms in the 6s5d³D[subscript "j"] levels and the 6s²¹S₀ground state through noble gas perturbers /Namiotka, Raychel K., January 1997 (has links)
Thesis (Ph. D.)--Lehigh University, 1997. / Includes vita. Bibliography: leaves 126-128.
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Role of rare-earth dopants on the improved creep properties of aluminum oxide /Cho, Junghyun, January 1998 (has links)
Thesis (Ph. D.)--Lehigh University, 1999. / Includes vita. Bibliography: leaves 229-242.
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The electrolysis of solutions of the rare earths ...Ray, Arthur Benning, January 1900 (has links)
Thesis (PH. D)--Cornell University, 1916. / "Reprinted from the Journal of the American chemical society, vol. XL, no. 1, January, 1918."
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Observations on the rare earths; Absorption and refraction of certain rare earth salts,Selwood, P. W. January 1900 (has links)
Abstracts of thesis (Ph. D.)--University of Illinois, 1931. / Vita. eContent provider-neutral record in process. Description based on print version record.
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Rare earth erbium doped yttrium barium copper oxide superconducting domains and their magnetic properties /Hicks, William Carl. January 2002 (has links)
Thesis (Ph. D.)--University of Washington, 2002. / Vita. Includes bibliographical references (leaves 121-127).
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