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Proceedings Paper

Influence of crystalline orientation on the superconducting properties in V/Cr-multilayers
Author(s): Yoshinori Kuwasawa; Tsutomu Nojima; Eisaku Touma; Masaki Fukuhara; Shigeru Nakano
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Paper Abstract

We investigated the superconducting properties of V/Cr-multilayers grown epitaxially on MgO(001) and Al2O2(1120) substrates. The samples with a preferred orientation of (001) and (110) were fabricated on MgO and Al2O2, respectively. The Cr-layer thickness was varied from dCr equals 2 to 100 angstroms under 300 angstroms thick V- layer. The critical temperature for (001)V/Cr abruptly drops in the range of dCr equals 5 to 30 angstroms, becoming a plateau above it and keeps lower than that for (110)V/Cr, in which Tc is gradually decreased up to dCr equals 80 angstroms. The dimensional crossover phenomenon on the parallel upper critical fields HC2 takes place in the range of dCr equals 20 approximately 70 angstroms and 5 approximately 25 angstroms for (110)V/Cr and (001)V/Cr, respectively. The superconducting layers are decoupled by dCr equals 30 angstroms for (001) and 80 angstroms for (110). The multilayers with (001) texture exhibit a little larger anisotropy for HC2 in such decoupling region compared with the case of (110). The strong pair breaking effect for (001) samples may be caused by the magnetic structure of Cr(001) surface.

Paper Details

Date Published: 29 June 1994
PDF: 9 pages
Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); doi: 10.1117/12.179164
Show Author Affiliations
Yoshinori Kuwasawa, Chiba Univ. (Japan)
Tsutomu Nojima, Chiba Univ. (Japan)
Eisaku Touma, Chiba Univ. (Japan)
Masaki Fukuhara, Chiba Univ. (Japan)
Shigeru Nakano, Chiba Univ. (Japan)

Published in SPIE Proceedings Vol. 2157:
Superconducting Superlattices and Multilayers
Ivan Bozovic, Editor(s)

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