Superconductivity and Critical Fields in Amorphous Tungsten/Silicon Multilayers | Zendy

Majkova E. | Zendy; Luby S. | Zendy; Jergel M. | Zendy; Löhneysen H. V. | Zendy; Strunk C. | Zendy; George B. | Zendy

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Superconductivity and Critical Fields in Amorphous Tungsten/Silicon Multilayers

Author(s) -

Majkova E.,

Luby S.,

Jergel M.,

Löhneysen H. V.,

Strunk C.,

George B.

Publication year - 1994

Publication title -

physica status solidi (a)

Language(s) - English

Resource type - Journals

eISSN - 1521-396X

pISSN - 0031-8965

DOI - 10.1002/pssa.2211450235

Subject(s) - superconductivity , amorphous solid , materials science , condensed matter physics , tungsten , coupling (piping) , perpendicular , magnetic field , critical field , silicon , amorphous silicon , crystallography , physics , chemistry , crystalline silicon , optoelectronics , metallurgy , geometry , mathematics , quantum mechanics

The superconducting properties of amorphous W/Si multilayers are studied. A nearly linear increase of T c with increasing number of W/Si bilayers N is observed for N = 3 to 10. The parallel and perpendicular critical field data show strong interlayer coupling between the superconducting layers in a (1 nm Si/1 nm W) × 10 multilayer and weak coupling for a (5 nm Si/1 nm W) × 9 multilayer. The broadening of the resistive transition in perpendicular magnetic fields is analyzed within the frame of the thermally activated flux flow model. A temperature independent activation energy U is found for weakly coupled W/Si multilayers with a magnetic field dependence U ∼ −ln H .

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