OBSERVATION OF ANOMALOUS TRANSITION IN THE UPPER CRITICAL FIELDS OF NB/NB0.5ZR0.5 MULTILAYERS

被引：31

作者：

KUWASAWA, Y ^{[1
]}

HAYANO, U ^{[1
]}

TOSAKA, T ^{[1
]}

NAKANO, S ^{[1
]}

MATUDA, S ^{[1
]}

机构：

[1] CHIBA UNIV, COLL ARTS & SCI, DEPT PHYS, CHIBA 280, JAPAN

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1990年 / 165卷 / 02期

关键词：

Angular Dependence - Upper Critical Fields;

D O I：

10.1016/0921-4534(90)90164-A

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An anomalous upturn in the parallel upper critical field is observed in the Nb/Nb0.5Zr0.5 multilayer with the period Λ=400 A ̊ and 500 A ̊, as predicted by Takahashi and Tachiki for multilayer composed of two materials with different electronic diffusion constants and equal transition temperature. We have found the anomalous feature in a temperature dependence of transition width ΔHc2{norm of matrix} in the region where the upturn occurs. In the angular dependence of the upper critical fields, the slope dHc2/dθ near the field direction parallel to the film surface also exhibits an abrupt change in the range of upturn. © 1990.

引用

页码：173 / 178

页数：6

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