Critical-state effects on microwave losses in type-II superconductors

被引：0
|
作者：
M. Bonura
E. Di Gennaro
A. Agliolo Gallitto
M. Li Vigni
机构：
[1] Università di Palermo,CNISM and Dipartimento di Scienze Fisiche ed Astronomiche
来源：
The European Physical Journal B - Condensed Matter and Complex Systems | 2006年 / 52卷
关键词：
74.25.Ha Magnetic properties; 74.25.Nf Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.); 74.60.Ge Flux pinning, flux creep, and flux-line lattice dynamics;
D O I：
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中图分类号：
学科分类号：
摘要：
We discuss the microwave energy losses in superconductors in the critical state. The field-induced variations of the surface resistance are determined, in the framework of the Coffey and Clem model, by taking into account the distribution of the vortex magnetic field inside the sample. It is shown that the effects of the critical state cannot generally be disregarded to account for the experimental data. Results obtained in bulk niobium at low temperatures are quantitatively justified.
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页码：459 / 463
页数：4
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