Structure and anisotropy of electric resistance of twin-free single crystals of high-temperature superconductors YBa2−<i>x</i>Sr<i>x</i>Cu3O7−<i>y</i>
B. I. VerkinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. M. DmitrievPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovDmitriy A. DikinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovМ. Б. КосмынаPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. V. MitkevichPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovO. P. Prikhod’koPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovS. F. ProkopovichPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. N. SvetlovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. P. SeminozhenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovE. V. KhristenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovG. E. ChurilovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
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Annotatsiya
Upon a partial substitution of Sr for Ba in the YBa2−xSrxCu3O7−y system it was revealed that orthorhombic superconducting single crystals with x≃0.5−0.8 are free of the twin structure that is typical of pure barium crystals with x = 0. The anisotropy in electric resistance was studied at room temperature in the directions a, b, and c for nonsuperconducting tetragonal, superconducting orthorhombic twin-free and superconducting orthorhomibic twin single crystals.
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0 ta iqtibos3 ta foydalanilgan manba
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