Spin Diffusion Length in Ferromagnet/Superconductor Bilayers
Journal
IEEE Transactions on Magnetics
Journal Volume
53
Journal Issue
11
Pages
9000104
Date Issued
2017
Author(s)
Abstract
We report a systematic study on the bilayers of ferromagnetic Sm 1-x Sr x MnO 3 (SSMO) and superconducting YBa 2 Cu 3 O 7 (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.
Type
journal article