Critical current control in a superconducting thin film with a ferromagnetic layer

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Colleges, School and Institutes


We report suppression of the critical current of thin film Yba(2)Cu(3)O(7) layers by altering the magnetization of a ferromagnetic La0.67Ca0.33MnO3 overlayer. We provide evidence that the critical current suppression is related to the spin-polarized state of the magnetic layer, rather than a direct magnetic influence. We argue that the spin diffusion length in the superconducting layer is small compared with the typical domain size in the ferromagnetic layer in its demagnetized state.


Original languageEnglish
Pages (from-to)2849-2852
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2
Publication statusPublished - 1 Jun 2003


  • magnetic materials, superconducting devices