Influence of crystalline orientation on the superconducting properties in V/Cr-multilayers

Yoshinori Kuwasawa; Tsutomu Nojima; Eisaku Touma; Masaki Fukuhara; Shigeru Nakano

doi:10.1117/12.179164

29 June 1994 Influence of crystalline orientation on the superconducting properties in V/Cr-multilayers

Yoshinori Kuwasawa, Tsutomu Nojima, Eisaku Touma, Masaki Fukuhara, Shigeru Nakano

Proceedings Volume 2157, Superconducting Superlattices and Multilayers; (1994) https://doi.org/10.1117/12.179164
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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 d_Cr equals 2 to 100 angstroms under 300 angstroms thick V- layer. The critical temperature for (001)V/Cr abruptly drops in the range of d_Cr equals 5 to 30 angstroms, becoming a plateau above it and keeps lower than that for (110)V/Cr, in which T_c is gradually decreased up to d_Cr equals 80 angstroms. The dimensional crossover phenomenon on the parallel upper critical fields H_C2 takes place in the range of d_Cr 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 d_Cr equals 30 angstroms for (001) and 80 angstroms for (110). The multilayers with (001) texture exhibit a little larger anisotropy for H_C2 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.

Citation Download Citation

Yoshinori Kuwasawa, Tsutomu Nojima, Eisaku Touma, Masaki Fukuhara, and Shigeru Nakano "Influence of crystalline orientation on the superconducting properties in V/Cr-multilayers", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); https://doi.org/10.1117/12.179164

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