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Higher-order elastic constants of La1.84Sr0.16CuO4 high-temperature superconductor

✍ Scribed by B. Singh; S. Gupta; S.C. Goyal

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
150 KB
Volume
450
Category
Article
ISSN
0921-4534

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✦ Synopsis

Finite deformation theory is used to obtain the strain energy density / of a tetragonal 2-1-4-type single crystal of the high-temperature superconductor La 2Γ€x Sr x CuO 4 . The complete set of second and third-order elastic constants of the high-temperature superconductor La 2Γ€x Sr x CuO 4 (x = 0.16) is calculated by taking into account the interactions between nine nearest-neighbour atoms in the lattice and using Mie-Gru Β¨neisen interatomic potential. For the sake of comparison we have also computed the values of these constants for x = 0.13-0.20. The values of third-order elastic constants of La 2Γ€x Sr x CuO 4 (x = 0.13-0.20) are negative and their absolute magnitudes are one order higher than those of the second-order elastic constants.

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