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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