Pulse current response of high-Tc superconducting vortex flow transistors

Y. Doda, T. Kiwa, I. Kawayama, H. Murakamia, M. Tonouchi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The properties of superconducting vortex flow transistor (SVFT), which consist of a vortex flow channel and a control line for applying a magnetic field, are diagnosed by using a current pulses train method. The time-domain waveforms of the vortex flow voltage along the channel were measure using the current pulses train with the pulse width of 5 ms as input signals. The fast response of the flow voltage suggests that the heating effect is negligible and the effect of the magnetic field generated by the control line was dominant in our measurement. The vortex flow speed was estimated from the ratio of the flux flow voltage to the control current, and was found to be 8.6×10 4 m/s. We also estimated the pinning energy Ep from the vortex flow speed, and found that the value of Ep is around 8.6 meV for our device, which can be easily excited by a conventional Ti:sapphire femtosecond laser.

Original languageEnglish
Pages (from-to)458-462
Number of pages5
JournalChinese Journal of Physics
Issue number4 II
Publication statusPublished - Aug 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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