Study of superconducting state parameters of binary BeCAL100-C metallic glasses

• Autorzy: Vora A. M.
• Języki publikacji: EN

Abstrakty

EN

The theoretical investigation of the superconducting state parameters (SSP) viz. electron-phonon coupling strength λ, Coulomb pseudopotential μ*, transition temperature TC, isotope effect exponent a and effective interaction strength NoV of BeCAl100-C (at C = 10 and 30 at %) metallic glasses, have been reported using Ashcroft's empty core (EMC) model potential. Five local field correction functions proposed by Hartree (H), Taylor (T), Ichimaru-Utsumi (IU), Farid et al. (F) and Sarkar et al. (S) are used in the present investigation to study the screening influence on the aforesaid properties. It is observed that the electron-phonon coupling strength λ and the transition temperature TC are quite sensitive to the selection of the local field correction functions, whereas the Coulomb pseudopotential μ*, isotope effect exponent α and effective interaction strength NoV show weak dependences on the local field correction functions. The TC obtained from lU-local field correction function are found to be in an excellent agreement with available theoretical or experimental data. Also, the present results are found in qualitative agreement with other such data reported earlier, what confirms the superconducting phase in the metallic glasses.

Słowa kluczowe

EN

pseudopotential; superconducting state parameters; Be-Al metallic glasses

PL

pseudopotencjał

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Journal of Technical Physics
• Rocznik: 2007
• Tom: Vol. 48, no 3-4
• Strony: 163--170
• Opis fizyczny: Bibliogr. 30 poz.

Twórcy

autor

Vora A. M.

• Parmeshwari 165, Vijaynagar Area, Hospital Road Bhuj-Kutch, 370 001, Gujarat, India,

Bibliografia

• 1. P.B. ALLEN, [in:] Handbook of superconductivity, C.P. Poole Jr. [Ed.] Academic Press, New York, p. 478, 1999.
• 2. A.V. NARLIKAR, S.N. EKBOTE, Superconductivity and superconducting materials, South Asian Publishers, New Delhi, 1983.
• 3. S.V. VONSOVSKY, Yu. A. IZYUMOV, E.Z. KURMAEV, Superconductivity of transition metals, their alloys and compounds, Springer-Verlag, Berlin 1982.
• 4. A.M. VORA, M.H. PATEL, P.N. GAJJAR, A.R. JANI, Pramana-J. Phys., 58, 849, 2002.
• 5. P.N. GAJJAR, A.M. VORA, M.H. PATEL, A.R. JANI, Int. J. Mod. Phys., BIT, 6001, 2003.
• 6. P.N. GAJJAR, A.M. VORA, A.R. JANI, Indian J. Phys., 78, 775, 2004.
• 7. ADITYA M. VORA, Physica C450, 135, 2006, Physica C458, 21, 2007, Physica C 458, 43, 2007, J. Supercond. Novel Magn., 20, 355, 2007, J. Supercond. Novel Magn., 20, 373, 2007, J. Supercond. Novel Magn., 20, 387, 2007, Supercond. Sci. Tech., 20, 542, 2007, Phys. Scr., 76, 204, 2007, J. Optoelec. Adv. Mater., 9, 2498, 2007, Comp. Mater. Sci., 40, 492, 2007; Front. Phys. China, 2, 430, 2007; Chinese Phys. Lett., 24, 2624, 2007.
• 8. A.M. VORA, M.H. PATEL, S.R. MISHRA, P.N. GAJJAR, A.R. JANI, Solid State Phys., 44, 345, 2001.
• 9. P.N. GAJJAR, A.M. VORA, A.R. JANI, Mod. Phys. Lett., B18, 573, 2004.
• 10. S. SHARMA, K.S. SHARMA, H. KHAN, Czech J. Phys., 55, 1005, 2005.
• 11. S. SHARMA, K. S. SHARMA, H. KHAN, Supercond. Sci. Technol., 17, 474, 2004.
• 12. S. SHARMA, H. KHAN, K. S. SHARMA, Phys. Stat. Sol. (b), 241, 2562, 2004.
• 13. S. SHARMA, H. KHAN, Solid State Physics, 46, 635, 2003.
• 14. S. SHARMA, H. KHAN, K.S. SHARMA, Ind. J. Pure & Appl. Phys., 41, 301, 2003.
• 15. M. GUPTA, P.C. AGARWAL, K.S. SHARMA, L. DASS, Phys. Stat. Sol. (b), 211, 731, 1999.
• 16. K.S. SHARMA, R. SHARMA, M. GUPTA, P.C. AGARWAL, L. DASS, [in:] The Physics of Disordered Materials, [Ed.] M.P. Saksena et al. NISCOM, p. 95, New Delhi 1997.
• 17. P.C. AGARWAL, M. GUPTA, K.S. SHARMA, L. DASS, [in:] The Physics of Disordered Materials, [Ed.] M.P. Saksena et al. (NISCOM, p. 102, New Delhi 1997.
• 18. M. GUPTA, K.S. SHARMA, L. DASS, Pramana-J. Phys., 48, 923, 1997.
• 19. R. SHARMA, K.S. SHARMA, Supercond. Sci. Technol., 10, 557, 1997.
• 20. N.W. ASHCROFT, Phys. Lett., 23, 48, 1966.
• 21. K.S. SHARMA, C.M. KACHHAVA, Solid State Commun., 30, 749, 1979.
• 22. V. VELJKOVIC, I. SLAVIC, Phys. Rev. Lett., 29, 105, 1972.
• 23. W.A. HARRISON, Pseudopotentials in the theory of metals, W.A. Benjamin, New York 1966.
• 24. R. TAYLOR, J. Phys. F: Met. Phys., 8, 1699, 1978. 170
• 25. S. ICHIMARU, K. UTSUMI, Phys. Rev., B24, 3220, 1981.
• 26. B. FARID, V. HEINE, G. ENGEL, I.J. ROBERTSON, Phys. Rev., B48, 11602, 1993.
• 27. A. SARKAR, D. SEN, H. HALDAR, D. ROY, Mod. Phys. Lett., B12, 639, 1998.
• 28. W.H. BUTLER, Phys. Rev., B15, 5267, 1977.
• 29. G. VON MINNIGERODE, K. SAMWER, Physica B, 108, 1217, 1981.
• 30. W.L. McMillan, Phys. Rev., 167, 331, 1968.