Elastic Properties of La<sub>2-x</sub>Sr<sub>x</sub>CuO<sub>4</sub> (x=0.10-0.20)
DOI:
https://doi.org/10.3329/jsr.v2i2.2513Keywords:
Phase transition temperature Tc, Debye Temperature, High-temperature superconductor.Abstract
The expressions for elastic constant for high temperature superconductors, derived using Mie-Grüneisen interaction potential, are used to analyze the elastic properties (bulk modulus, elastic wave velocity) of La2-xSrxCuO4 for x = 0.10 to 0.20. The Debye temperature θD has also been computed which is found to decrease with increasing Sr concentration. The value of bulk modulus in superconducting phase (Ks) is larger than the value in its normal phase (Kn=113.8 GPa) for x = 0.10 to 0.14. After this limit Ks decreases. A simple empirical relation between the difference in bulk moduli in the two phases (superconducting and normal) and Tc is proposed. The value of Tc for La1.85Sr0.15CuO4 obtained from the proposed relationship is in good agreement with the experimental value.
Keywords: Phase transition temperature; Debye temperature; High-temperature superconductor.
© 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.
DOI: 10.3329/jsr.v2i2.2513 J. Sci. Res. 2 (2), 294-301 (2010)
Downloads
115
122
Downloads
Published
How to Cite
Issue
Section
License
© Journal of Scientific Research
Articles published in the "Journal of Scientific Research" are Open Access articles under a Creative Commons Attribution-ShareAlike 4.0 International license (CC BY-SA 4.0). This license permits use, distribution and reproduction in any medium, provided the original work is properly cited and initial publication in this journal. In addition to that, users must provide a link to the license, indicate if changes are made and distribute using the same license as original if the original content has been remixed, transformed or built upon.