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Enhancing Superconducting Parameters by Array of External Magnetic Dots

Published online by Cambridge University Press:  31 January 2011

Wei Jiang Yeh  and
Bo Cheng
Wei Jiang Yeh
Affiliation:
wyeh@uidaho.edu, University of Idaho, Physics Department, P.O. Box 440903, Moscow, Idaho, 83844-0903, United States, (208)885-6380, (208)885-4055
Bo Cheng
Affiliation:
bcheng@alturasanalytics.com, University of Idaho, Department of Physics, Moscow, Idaho, United States
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Abstract

Enhancing the pinning force in high-Tc superconductors can be achieved by externally introduced periodic magnetic dots. We use a novel nano-technique to deposit periodic sub-micon Ni dots on YBa2Cu3O7 thin films. The current versus voltage characteristics of an YBa2Cu3O7 thin film strip with uniform Ni dots are measured at various temperatures and magnetic fields. They are compared with the current versus voltage characteristics of a bare YBa2Cu3O7 thin film strip without magnetic dots. It is found the critical current value of the strip with Ni dots reduces with a much slower pace as the magnetic field strength increases in comparison with the value of the bare sample.

Keywords

superconductingnanoscalemagnetic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1180: Symposium CC – Nanoscale Functionalization and New Discoveries in Modern Superconductivity , 2009 , 1180-CC05-09
Copyright
Copyright © Materials Research Society 2009

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