TY - GEN
T1 - Influence of crystalline orientation on the superconducting properties in V/Cr-multilayers
AU - Kuwasawa, Yoshinori
AU - Nojima, Tsutomu
AU - Touma, Eisaku
AU - Fukuhara, Masaki
AU - Nakano, Shigeru
PY - 1994
Y1 - 1994
N2 - 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 = 2 to 100 angstroms under 300 angstroms thick V- layer. The critical temperature for (001)V/Cr abruptly drops in the range of dCr = 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 = 80 angstroms. The dimensional crossover phenomenon on the parallel upper critical fields HC2| takes place in the range of dCr = 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 = 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.
AB - 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 = 2 to 100 angstroms under 300 angstroms thick V- layer. The critical temperature for (001)V/Cr abruptly drops in the range of dCr = 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 = 80 angstroms. The dimensional crossover phenomenon on the parallel upper critical fields HC2| takes place in the range of dCr = 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 = 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.
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U2 - 10.1117/12.179164
DO - 10.1117/12.179164
M3 - Conference contribution
AN - SCOPUS:0028740575
SN - 0819414522
SN - 9780819414526
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 291
EP - 299
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - Publ by Society of Photo-Optical Instrumentation Engineers
T2 - Superconducting Superlattices and Multilayers
Y2 - 24 January 1994 through 25 January 1994
ER -