Effect of Magnetic Fields on Silver Contacts to YBCO and YBCO:Ag Composite Superconductors
The effect of magnetic fields on the electrical properties of silver-HTSC contacts is investigated. The addition of Ag2O to YBCO greatly reduces the contact resistance as well as increases the critical current of the contact. The minimum recovery time for magnetically induced contact resistance is about six seconds. For magnetic field greater than 7 Gauss the contact resistance decays to a finite value greater than the value before the contact exposed to the magnetic field and stays there for a long time, as long as the sample is kept below the superconductivity critical temperature.
KeywordsMagnetic Field Contact Resistance Applied Magnetic Field Critical Current Apply Physic Letter
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