Cu63 NMR Study of Superconducting Cu/Nb Superlattice

R. Aoki, G. Q. Zheng, Y. Kohori, Y. Oda, K. Asayama, S. Wada, Y. Obi

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1 Citation (Scopus)

Abstract

Nuclear spin lattice relaxation time T1 of Cu63 was measured for Cu/Nb multilayered sample, in each 50 layers of Cu and Nb with thicknesses of 400 Å and 245 Å. The superconducting transition was observed by magnetic induction at Tc=4.6 K. As temperature T is lowered below Tc, the relaxation rate T1-1 is once increased and then decreased exponentialy. This behavior is characterized by the existence of superconducting energy gap 2Δ=0.96 meV=2.4 kBTc in Cu. For further lowering of T below 0.8 K, the rapid decreasing in T1-1 was replaced by a gradual change almost proportional to T.

Original languageEnglish
Pages (from-to)1455-1456
Number of pages2
JournalJapanese Journal of Applied Physics
Volume26
Issue numberS3-2
DOIs
Publication statusPublished - Jan 1987

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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