Investigation of current gain in superconducting-ferromagnetic transistors

I. P. Nevirkovets, G. Prokopenko, O. A. Mukhanov, O. Chernyashevskyy, J. B. Ketterson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

The superconductor-ferromagnetic transistors (SFTs) with the SISFIFS structure (where S, I, and F denote a superconductor (Nb), an insulator (AlOx), and a ferromagnetic material (Ni), respectively) are promising for various applications in superconducting electronics. Specifically, as current amplifiers, they can be used as line drivers and cell selectors in cryogenic memory. Here we report on results of a study of dependence of current gain on the SFIFS injector and SIS acceptor barrier transparency. We demonstrate that making the acceptor junction much more transparent than the injector junction results in improvement of the current gain; in particular it can exceed unity. Therefore proper device engineering allows one to efficiently control the maximum Josephson current in the SIS acceptor junction using the quasiparticle injection.

Original languageEnglish (US)
Title of host publication2015 15th International Superconductive Electronics Conference, ISEC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467383486
DOIs
StatePublished - Jan 14 2016
Event15th International Superconductive Electronics Conference, ISEC 2015 - Nagoya, Japan
Duration: Jul 6 2015Jul 9 2015

Publication series

Name2015 15th International Superconductive Electronics Conference, ISEC 2015

Other

Other15th International Superconductive Electronics Conference, ISEC 2015
Country/TerritoryJapan
CityNagoya
Period7/6/157/9/15

Keywords

  • Ferromagnetic-superconducting hybrid structures
  • Josephson effect
  • Proximity effect
  • Quasiparticle injection
  • Superconducting transistor
  • Superconductivity

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Investigation of current gain in superconducting-ferromagnetic transistors'. Together they form a unique fingerprint.

Cite this