[Zurück]

A. Kortyka, R. Puzniak, A. Wisniewski, H. W. Weber, C. Tang, X. Yao, K. Conder:
"Irreversibility line and anisotropy of SmBa₂Cu₃O_7-δ with varying oxygen content";
Physica C: Superconductivity and its Applications, 470 (2010), S. 217 - 218.

We report on magnetization and torque measurements of SmBa₂Cu₃O_7-δ (Sm123) single crystals with an
oxygen content 7-δ = 6.60, 6.70 and 6.78. The anisotropy increases from 40.1 ± 0.4 to 56.4 ± 0.7 with
decreasing oxygen content from 6.78 to 6.70. The crossover field, H_cr, where the irreversibility line
changes slope, is lowered for crystal with a lower oxygen content. The H_cr values are higher for Sm123
than for YBa₂Cu₃O_7-δ (Y123) single crystals. The anisotropy dependence on the oxygen content is compared
to that of Y123.

Sm123, Effective mass anisotropy, Irreversibility line, Oxygen content

http://dx.doi.org/10.1016/j.physc.2009.10.150

http://publik.tuwien.ac.at/files/PubDat_192013.pdf