On the superconductivity of vanadium based alloys
Creators
- 1. Freie Univ., Berlin (Germany, F.R.). Inst. fuer Theoretische Physik
- 2. Liege Univ. (Belgium). Inst. de Physique
Description
The electron density of states of solid solutions of vanadium based transition metal alloys V90 X10 is computed with the aim of calculating the superconducting transition temperature using the McMillan formula. As observed experimentally for X on the left hand side of V in the periodic table, one obtains an increase of Tc while for X on the right hand side of V the critical temperature decreases. The detailed comparison with experiments indicate that when the bandwidths of the two constituents are different, one cannot neglect the variation of the electron-phonon interactions. Another important conclusion is that for alloys which are in the split-band limit like VAu, VPd and VPt, the agreement with experimental data can be obtained only by assuming that these alloys have a short-range order favouring clusters of pure vanadium. (Author)
Abstract (Portuguese)
A densidade de estados de eletrons em solucoes solidas de ligas metalicas a partir de vanadio V90X10 e calculada com o objetivo de calcular a temperatura critica supercondutora pela formula de MaCMillan. Observou-se experimentalmente que para X a esquerda de V na tabela periodica, obtem-se um aumento de Tc enquanto que para X a direita de V a temperatura critica diminui. A comparacao detalhada com a experiencia indica que quando as larguras de banda dos dois constituintes sao diferentes, pode-se desprezar a variacao da interacao eletron-fonon. Outra conclusao importante e que para ligas que estao no limite de separacao de bandas assim como VAu, VPd e VPt, o acordo experimental so pode ser obtido admitindo que essas ligas tenham uma ordem de curto alcance favorecendo clusters de vanadium puro. (MWO)Files
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Additional details
Additional titles
- Original title (no language)
- Anais do Simposio Latino-Americano de Fisica dos Sistemas Amorfos- v.1.
Publishing Information
- Imprint Title
- Proceedings of the Latin American Symposium of Physics of Amorphous Systems - v.1
- Imprint Pagination
- 269 p.
- Journal Page Range
- p. 176-185.
- Report number
- INIS-BR--901
Conference
- Title
- Latin American Symposium of Physics of Amorphous Systems.
- Dates
- 27 Feb - 2 Mar 1984.
- Place
- Niteroi, RJ (Brazil).
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 18097152
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ALLOY SYSTEMS; AMORPHOUS STATE; BAND THEORY; ELECTRONIC STRUCTURE; SUPERCONDUCTING COMPOSITES; VANADIUM BASE ALLOYS
- Descriptors DEC
- ALLOYS; COMPOSITE MATERIALS; MATERIALS; VANADIUM ALLOYS
Optional Information
- Notes
- Imprint:Anais do Simposio Latino-Americano de Fisica dos Sistemas Amorfos- v.1.