文章基本信息
- 标题：Elastic Properties of La 2-x Sr x CuO 4 (x=0.10-0.20)
- 本地全文：下载
- 作者：S. Gupta ; D. S. Tomar ; S. C. Goyal 等
- 期刊名称：Journal of Scientific Research
- 印刷版ISSN：2070-0237
- 电子版ISSN：2070-0245
- 出版年度：2010
- 卷号：2
- 期号：02
- 页码：294-301
- DOI：10.3329/jsr.v2i2.2513
- 出版社：Rajshahi University
- 摘要：
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- x Sr x CuO4 for x = 0.10 to 0.20. The Debye temperature θ D has also been computed which is found to decrease with increasing Sr concentration. The value of bulk modulus in superconducting phase ( K s) is larger than the value in its normal phase ( K n=113.8 GPa) for x = 0.10 to 0.14. After this limit K s decreases. A simple empirical relation between the difference in bulk moduli in the two phases (superconducting and normal) and T c is proposed. The value of T c 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)
- 关键词：Phase transition temperature Tc, Debye Temperature
