Volume 10, Issue 1 (Iranian Journal of physics Research, Spring 2010)                   IJPR 2010, 10(1): 65-65 | Back to browse issues page

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Vora A M. Pressure effects on Ca60Al40 metallic glass superconductors. IJPR. 2010; 10 (1) :65-65
URL: http://ijpr.iut.ac.ir/article-1-467-en.html
Gujarat University of India , voraam@yahoo.com
Abstract:   (9898 Views)
Theoretical computation of the pressure dependence superconducting state parameters of binary Ca60Al40 is reported using model potential formalism. Explicit expressions have been derived for the volume dependence of the electron–phonon coupling strength λ and the Coulomb pseudopotential μ* considering the variation of Fermi momentum KF and Debye temperature ӨD with volume. Well known Ashcroft’s empty core model pseudopotential and five different types of the local field correction functions viz. Hartree, Taylor, Ichimaru-Utsumi, Farid et al. and Sarkar et al. have been used for obtaining pressure dependence of transition temperature TC and the logarithmic volume derivative Ф of the effective interaction strength NOV for metallic glass superconductor. It has been observed that TC of Ca60Al40 metallic glass decreases rapidly with increase of pressure upto 60% decrease of volume, for which the μ* and Ф curves show a linear nature. The superconducting phase disappears at about 60% decrease of volume.
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Type of Study: Research | Subject: General

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