Spin Diffusion Length in Ferromagnet/Superconductor Bilayers

S. L. Cheng, T. H. Chuang, J. G. Lin

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We report a systematic study on the bilayers of ferromagnetic Sm1-xSrxMnO3 (SSMO) and superconducting YBa2Cu3O7 (YBCO). The bilayer structure is composed of one SSMO layer of 10-nm thickness and one layer of YBCO of various thicknesses. The measurements of X-ray diffraction/reflectivity, resistivity, and magnetization were carried out for determining the crystalline properties and the superconducting temperatures of bilayers. A significant suppression of superconducting temperature is observed in all bilayers, indicating that the spin-polarized quasi-particles of SSMO are efficiently injected into the YBCO layer. The experimental results will be discussed in term of the spin diffusion length of polarized quasi-particles with a model of inverse proximity.

Original languageEnglish
Article number7938722
JournalIEEE Transactions on Magnetics
Issue number11
StatePublished - Nov 2017


  • Exchange energy
  • polarized quasi-particle
  • spin diffusion length


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