Eur. Phys. J. B 41, 439-444 (2004)
https://doi.org/10.1140/epjb/e2004-00336-1

Nucleation of superconductivity in finite metallic multilayers: Effect of the symmetry

¹ Belarus State University of Informatics and Radioelectronics, P. Browka str. 6, Minsk 220013, Belarus
² Dipartimento di Fisica “E.R. Caianiello” and INFM-Laboratorio Regionale Supermat, Università degli Studi di Salerno, 84081 Baronissi (SA), Italy
³ Dipartimento di Fisica “E.R. Caianiello” and INFM-Coherentia, Università degli Studi di Salerno, 84081 Baronissi (SA), Italy

Corresponding author: ^a attanasio@sa.infn.it

Received: 3 December 2003
Revised: 23 July 2004
Published online: 5 November 2004

Abstract

The influence of the finite dimensions of superconducting metallic multilayers on H-T phase diagram is studied. It is established that the geometrical symmetry of the samples determines crucially the dependencies. For samples where the symmetry plane is in the middle of the superconducting layer the values are, for temperatures close to T_c, larger than the values of the samples for which the symmetry plane lies in the middle of the normal layer. The results are analysed on the basis of the Ginzburg-Landau approach and are explained by considering the different symmetry of the wave function describing the system. The experimental results are in good agreement with the elaborated model, which takes into account the actual symmetry of the samples.