Hopkins, Stuart Thomas (1983) Low temperature specific heat studies of molybdenum-ruthenium based superconducting metallic glasses. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-10102002-125642
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Low temperature specific heat measurements have been used to investigate the electronic structure and superconducting properties of metallic glasses based on transition metals Mo and Ru alloyed with metalloids B and Si. An apparatus constructed for making these measurements is described. The results obtained are discussed in terms of the dependence of the density of states at the Fermi level[...] and of the Debye temperature[...]on metalloid content, and the influence of these parameters on observed properties.[...] is shown to reflect the shortrange order of the metal atoms and in Mo-Ru-B alloys, indicates the existence of two distinct amorphous phases. In addition,[...] strongly influences the superconductivity and electronic properties of these materials. Alloying with metalloids increases the Debye temperature of the amorphous Mo-Ru phase and thus affects the superconductivity through the dependence of the electron-phonon coupling on average phonon frequency. A comparison with elastic properties shows an anomalous effect in the lattice specific heat commonly observed in insulating glasses.
|Item Type:||Thesis (Dissertation (Ph.D.))|
|Degree Grantor:||California Institute of Technology|
|Division:||Engineering and Applied Science|
|Major Option:||Applied Physics|
|Thesis Availability:||Restricted to Caltech community only|
|Defense Date:||20 September 1982|
|Default Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Imported from ETD-db|
|Deposited On:||10 Oct 2002|
|Last Modified:||26 Dec 2012 03:04|
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