Realization and characterization of tunnel junctions based on Nb/CuMn multilayers

Authors
Della Rocca, ML Attanasio, C Carapella, G Mercaldo, LV Salvato, M Maritato, L
Citation
Ml. Della Rocca et al., Realization and characterization of tunnel junctions based on Nb/CuMn multilayers, SUPERCOND S, 14(9), 2001, pp. 794-797
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
ISSN journal
09532048 → ACNP
Volume
14
Issue
9
Year of publication
2001
Pages
794 - 797
Database
ISI
SICI code
0953-2048(200109)14:9<794:RACOTJ>2.0.ZU;2-I
Abstract
High quality planar tunnel junctions based on Nb/CuMn (superconducting/spin glass) multilayers are realized and investigated. When changing the CuMn l ayer thickness d(CuMn) from 4 to 45 Angstrom, keeping constant Mn concentra tion (2.35%) and Nb layer thickness (250 Angstrom), a temperature dependenc e for the gap in accordance with the Bardeen-Cooper-Schrieffer (BCS) theory , with zero temperature values Delta (0) in the range 0.79-1.05 +/-0.02 meV , is observed. Moreover, Delta (0) decreases when d(CuMn) increases in the same fashion as the critical temperature T-c, revealing a similar effect of the CuMn layers in suppressing both T-c and Delta (0).