TY - JOUR
T1 - 63Cu NMR Study of Superconducting Cu/Nb Multilayer-Film
AU - Aoki, Ryozo
AU - Zheng, Guo Qing
AU - Kohori, Yoh
AU - Oda, Yasukage
AU - Asayama, Kunisuke
AU - Wada, Shinji
PY - 1987/1/1
Y1 - 1987/1/1
N2 - Nuclear spinlattice relaxation time T1 of 63Cu was measured by the field cycling method in a Cu/Nb multilayer sample, which was prepared by rf-sputtering alternately deposited in each 50 layers of Cu and Nb with thicknesses of 400 Å and 245 Å. As the temperature T is lowerd below the superconducting transition temperature Tc=4.6 K, the spin relaxation rate T-11 initially increases and then rapidly decreases. This behavior indicates the existence of superconducting energy gap 2Δ(0) = 0.96 meV = 2.4kB7″c in Cu. Below 0.8 K, the rapid exponential decrease in T-11 is followed by a gradual change almost proportional to T.
AB - Nuclear spinlattice relaxation time T1 of 63Cu was measured by the field cycling method in a Cu/Nb multilayer sample, which was prepared by rf-sputtering alternately deposited in each 50 layers of Cu and Nb with thicknesses of 400 Å and 245 Å. As the temperature T is lowerd below the superconducting transition temperature Tc=4.6 K, the spin relaxation rate T-11 initially increases and then rapidly decreases. This behavior indicates the existence of superconducting energy gap 2Δ(0) = 0.96 meV = 2.4kB7″c in Cu. Below 0.8 K, the rapid exponential decrease in T-11 is followed by a gradual change almost proportional to T.
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U2 - 10.1143/JPSJ.56.4495
DO - 10.1143/JPSJ.56.4495
M3 - Article
AN - SCOPUS:70350317820
VL - 56
SP - 4495
EP - 4502
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 12
ER -