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Open Access item Ferromagnetic proximity effect in a-CoxSi1−x/Nb bilayers: Role of magnetic disorder and interface transparency
|Authors:||Alija, Alfonso R.|
Martín, J. I.
Alameda, J. M.
|Publisher:||American Physical Society (APS)|
|Citation:||Physical Review B 82(18): 184529 (2010)|
|Abstract:||The superconducting and magnetic properties of a-CoxSi1−x /Nb bilayers have been studied as a function of
Co content in order to analyze the superconducting/ferromagnetic proximity effect in a system with strong
disorder in the magnetic layers. As Co atoms become more diluted, the magnetization of the amorphous
a-CoxSi1−x alloy decreases gradually, whereas their resistivity increases and enters in a weak localization
regime. The superconducting transition temperatures of the a-CoxSi1−x /Nb bilayers follow a decreasing trend
as Co content is reduced, reaching the lowest value at the boundary between the ferromagnetic-nonmagnetic
amorphous phases. These results can be understood in terms of the increase in interface transparency together
with the changes in the spin-flip scattering term as magnetic disorder increases and the amorphous a-CoxSi1−x
layers loose their magnetic character.|
|Description:||7 páginas. 4 figuras.-- PACS number(s): 74.45.+c.-- et al.|
|Publisher version (URL):||http://dx.doi.org/10.1103/PhysRevB.59.14659|
|Appears in Collections:||(CINN) Artículos|
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