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Superconductivity and the electronic structure of Zr- and Hf-based metallic glasses

Tenhover, M. and Johnson, W. L. (1983) Superconductivity and the electronic structure of Zr- and Hf-based metallic glasses. Physical Review B, 27 (3). pp. 1610-1618. ISSN 0163-1829. http://resolver.caltech.edu/CaltechAUTHORS:TENprb83

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Abstract

The results of a comprehensive study of the superconducting transition temperatures of Zr- and Hf-based metallic glasses are reported. The microscopic origins of superconductivity in these glasses are discussed in terms of recent ultraviolet photoelectron spectroscopy (UPS) measurements and calculations based on the renormalized atom technique. These calculations accurately predict the UPS spectra and the results of low-temperature heat-capacity measurements. The complete description of the electronic structure afforded by these calculations allows, for the first time, a consistent picture of the variation of Tc with X in the glasses Zr1-yXy (X=3d or 4d transition metals). In addition, the dependence of Tc with composition (y) can be understood in terms of the X d subband positions relative to EF. The results reported here support our recent contention that the strong depression of Tc observed for X=Fe, Mn, Cr, and V glasses is related to the formation of localized magnetic moments and spin fluctuations. An alternate explanation for the low Tc of X=V and Cr glasses based on the idea of an atomic-structure change is also discussed.


Item Type:Article
Additional Information:©1983 The American Physical Society. Received 3 May 1982. One of us (W.L.J.) received support from the U.S. Department of Energy, Project Agreement No. DE-AT03-81ER10870 under Contract No. DE-AM03-76SF00767.
Record Number:CaltechAUTHORS:TENprb83
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:TENprb83
Alternative URL:http://dx.doi.org/10.1103/PhysRevB.27.1610
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9142
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:01 Nov 2007
Last Modified:26 Dec 2012 09:45

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