Angular dependence of the upper critical field in Bi2Sr2CuO6+δ
Angular dependence of the upper critical field in Bi2Sr2CuO6+δ
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Bi2Sr2CuO6+δ 中上临界场的角度依赖性
DOI：
10.1134/1.1475722
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Y. Ovchinnikov
中科院分区：
文献类型：
--
作者：
S. Vedeneev;Y. Ovchinnikov
在高达 28 T 的磁场中，在临界温度 T [sub c]（中点）= 9 K 的非常高质量的 Bi [sub 2] Sr [sub 2] CuO [sub 6+ δ] 单晶的宽温度范围内研究了上临界磁场的角度依赖性。如图 10 [sup 4] 所示，上临界场的各向异性比 H [sub c][sub 2||][sub ab]/H [sub c][sub 2⊥][sub ab] 要小得多，并且表现出意想不到的温度依赖性。提出了一种基于超导层之间强各向异性和小透明度的模型。© 2002 MAIK“Nauka/Interperiodica”。
The angular dependence of the upper critical magnetic field was investigated in a wide range of temperatures in very high-quality Bi [sub 2] Sr [sub 2] CuO [sub 6+ δ] single crystals with critical temperature T [sub c](midpoint)= 9 K in magnetic fields up to 28 T. Although the typical value of the normal state resistivity ratio ρ [sub c]/ρ [sub ab] approx. 10 [sup 4], the anisotropy ratio H [sub c][sub 2||][sub ab]/H [sub c][sub 2⊥][sub ab] of the upper critical fields is much smaller and shows an unexpected temperature dependence. A model based on strong anisotropy and small transparency between superconducting layers is proposed.© 2002 MAIK “Nauka/Interperiodica”.