Relaxation Process of Spin-Polarized Quasiparticles in a Superconducting Nb Wire

T. Iwahori, K. Mizokami, R. Matsuda, K. Ohnishi, T. Kimura

Research output: Contribution to journalArticlepeer-review


A mesoscopic multi-terminal superconducting Nb strip with a spin injection terminal has been developed. We investigate the influence of spin polarization on the relaxation process of the quasiparticle in the superconducting Nb. The position dependence of the nonlocal voltage provides the quasiparticle relaxation length. The relaxation length for the spin-polarized quasiparticle is found to show a 12.5% increase from that for the un-polarized quasiparticle. This demonstration opens a new avenue for utilization of the spin current in a superconducting device.

Original languageEnglish
JournalIEEE Transactions on Magnetics
Issue number2
Publication statusPublished - Feb 1 2022

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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