63Cu NMR study of superconducting Cu/Nb multilayer-film

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

Research output: Contribution to journalArticle

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Abstract

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 T1-1 initially increases and then rapidly decreases. This behavior indicates the existence of superconducting energy gap 2Δ(0)=0.96 meV=2.4kBTc in Cu. Below 0.8 K, the rapid exponential decrease in T1-1 is followed by a gradual charige almost proportional to T.

Original languageEnglish
Pages (from-to)4495-4502
Number of pages8
JournalJournal of the Physical Society of Japan
Volume56
Issue number12
Publication statusPublished - Dec 1987
Externally publishedYes

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nuclear relaxation
relaxation time
sputtering
transition temperature
nuclear magnetic resonance
cycles
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Aoki, R., Zheng, G-Q., Kohori, Y., Oda, Y., Asayama, K., & Wada, S. (1987). 63Cu NMR study of superconducting Cu/Nb multilayer-film. Journal of the Physical Society of Japan, 56(12), 4495-4502.

63Cu NMR study of superconducting Cu/Nb multilayer-film. / Aoki, Ryozo; Zheng, Guo-Qing; Kohori, Yoh; Oda, Yasukage; Asayama, Kunisuke; Wada, Shinji.

In: Journal of the Physical Society of Japan, Vol. 56, No. 12, 12.1987, p. 4495-4502.

Research output: Contribution to journalArticle

Aoki, R, Zheng, G-Q, Kohori, Y, Oda, Y, Asayama, K & Wada, S 1987, '63Cu NMR study of superconducting Cu/Nb multilayer-film', Journal of the Physical Society of Japan, vol. 56, no. 12, pp. 4495-4502.
Aoki R, Zheng G-Q, Kohori Y, Oda Y, Asayama K, Wada S. 63Cu NMR study of superconducting Cu/Nb multilayer-film. Journal of the Physical Society of Japan. 1987 Dec;56(12):4495-4502.
Aoki, Ryozo ; Zheng, Guo-Qing ; Kohori, Yoh ; Oda, Yasukage ; Asayama, Kunisuke ; Wada, Shinji. / 63Cu NMR study of superconducting Cu/Nb multilayer-film. In: Journal of the Physical Society of Japan. 1987 ; Vol. 56, No. 12. pp. 4495-4502.
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AU - Wada, Shinji

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