A.C. LOSSES IN NIOBIUM SINGLE CRYSTALS IN MEISSNER STATE

被引：1

作者：

BRANKIN, PR

RHODES, RG

机构：

[1] School of Engineering Science, University of Warwick

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 1969年 / 2卷 / 12期

关键词：

D O I：

10.1088/0022-3727/2/12/419

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Losses at 50 Hz as a function of magnetic field and surface profile have been investigated in single crystal samples of niobium at 4·2°K using an electronic wattmeter. The losses in samples with smooth surfaces were less than 5 × 10-4 W Hz-1 m-2 at 1 × 105 A m-1 (1250 Oe). A sample with a cold-worked surface showed higher losses both before and after the surface was polished. It is concluded that the surface finish is of major importance in determining the magnitude of losses below the lower critical field.

引用

页码：1775 / +

页数：1

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