Temperature and magnetic field dependence of the induced magnetization in macroscopic samples due to the proximity effect
- L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, Kosygin 2, Moscow, 11733V (Russia)
- Naval Research Laboratory, Code 6344, Washington, D.C. 20375-5000 (United States)
- Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
We have applied the Ginzburg-Landau equations to calculate the behavior of the diamagnetism of macroscopic samples consisting of a normal metal in contact with a superconductor. In particular, the calculation focuses on the temperature region above the superconductive transition temperature T{sub cN} of the normal metal. We have compared these calculations with experimental measurements of the temperature (0.006{endash}1 K) and magnetic field (10{sup {minus}9}{endash}10{sup {minus}6}thinspT) dependence of the diamgnetism for several samples of Be (T{sub cN}{approximately}23thinspmK) and W (T{sub cN}{approximately}15.5thinspmK) in contact with the superconductor Al (T{sub cS}=1.18thinspK). The agreement between the predictions and measurements is quite good and confirms the approach of using the Ginzburg-Landau model to calculate the proximity effect in macroscopic normal systems above their superconductive transitions. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 632643
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 56; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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