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Quasiperiodic superconducting V/Zr multilayers: critical magnetic fields and crossover

 

作者: N. Ya. Fogel,   V. G. Cherkasova,   M. Yu. Mikhaı˘lov,   Yu. V. Bomze,   O. I. Yuzephovich,   I. M. Dmitrenko,   A. N. Stetsenko,  

 

期刊: Low Temperature Physics  (AIP Available online 1998)
卷期: Volume 24, issue 8  

页码: 551-554

 

ISSN:1063-777X

 

年代: 1998

 

DOI:10.1063/1.593635

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Critical magnetic fields parallel and perpendicular to the planes of quasiperiodic superconducting Fibonacci multilayers (ML) consisting of vanadium and zirconium are measured. The temperature dependence of the parallel critical fieldHc∥displays two crossovers. TheHc∥(T)dependence is of square-root type in the vicinity of the transition temperatureTcand linear at low temperatures. Between these temperature intervals, the dependence follows a power law:Hc∥∼(1−T/Tc)&agr;,&agr;=0,78±0,02.The complex nature of this dependence can be explained in the framework of the Ginzburg–Landau theory for a quasiperiodic ML, as well as by the scaling theory for fractal multilayers which takes into account the different structure length scales in the case of ML with a complex sequence of layers. ©1998 American Institute of Physics.

 

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