Spin-dependent transparency of ferromagnet/superconductor interfaces

Xia, K. and Kelly, P.J. and Bauer, G.E.W. and Turek, I. (2002) Spin-dependent transparency of ferromagnet/superconductor interfaces. Physical Review Letters, 89 (16). 166603/1-166603/4. ISSN 0031-9007

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Abstract:	We combine parameter-free calculations of the transmission and reflection matrices for clean and dirty interfaces with a scattering-theory formulation of Andreev reflection (AR) generalized to spin-polarized systems in order to critically evaluate the use of an extended Blonder-Tinkham-Klapwijk (BTK) model to extract values of the spin polarization for ferromagnetic metals from measurements of point-contact AR. Excellent agreement with the experimental conductance data is found for Pb/Cu but it is less good for Pb/Ni and poor for Pb/Co, indicating that the BTK formalism does not describe transport through superconducting/ferromagnetic interfaces correctly.
Item Type:	Article
Copyright:	© 2002 The American Physical Society
Faculty:	Science and Technology (TNW)
Research Group:	Computational Materials Science (CMS)
Link to this item:	http://purl.utwente.nl/publications/43376
Official URL:	http://dx.doi.org/10.1103/PhysRevLett.89.166603
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Metis ID: 206460