63Cu NMR Study of Superconducting Cu/Nb Multilayer-Film

Ryozo Aoki, Guo Qing Zheng, Yoh Kohori, Yasukage Oda, Kunisuke Asayama, Shinji Wada

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9 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)4495-4502
Number of pages8
Journaljournal of the physical society of japan
Issue number12
Publication statusPublished - Jan 1 1987
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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