Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10653242 | Solid State Communications | 2005 | 5 Pages |
Abstract
We report magnetization measurements of grain-aligned Ba2Ca2Cu3O6(O,F)2 with Tcâ108 K. The interlayer distance of the material is the shortest among known tri-layer superconductors. Unexpectedly, the magnetization data show that the coupling strength between CuO2 layers is rather weak. A direct reflection of the weak coupling is highly suppressed irreversibility line, i.e. a broad reversible region in H-T plane. The decoupling field obtained from the irreversibility line is less than 0.1 T, which is comparable with that of quasi two-dimensional superconductor Bi2Sr2CaCu2O8+δ. Comparison of data with the Hao-Clem model gives characteristic parameters [ξab(0) and λab(0)] and the critical fields [Hc(0) and Hc2c(0)]. A large value of penetration depth, λab(0)=240 nm reflects a small carrier concentration in CuO2 planes, and explains the reason of the weak interlayer coupling.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Mun-Seog Kim, Kyu-Tae Kim, Heon-Jung Kim, Kyung-Hee Kim, Jin-Ju Ko, Jung-Dae Kim, Sung-Ik Lee, A. Iyo, Y. Tanaka,