All-spinel oxide Josephson junctions for high-efficiency spin filtering

S. Mesoraca, S. Knudde, D.C. Leitao, S. Cardoso, M.G. Blamire

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

Obtaining high efficiency spin filtering at room temperature using spinel ferromagnetic tunnel barriers has been hampered by the formation of antiphase boundaries due to their difference in lattice parameters between barrier and electrodes. In this work we demonstrate the use of LiTi2O4 thin films as electrodes in an all-spinel oxide CoFe2O4-based spin filter devices. These structures show nearly perfect epitaxy maintained throughout the structure and so minimise the potential for APBs formation. The LiTi2O4 in these devices is superconducting and so measurements at low temperature have been used to explore details of the tunnelling and Josephson junction behaviour.

Original languageEnglish
Article number015804
JournalJournal of Physics: Condensed Matter
Volume30
Issue number1
DOIs
Publication statusPublished - 10 Jan 2018
Externally publishedYes

Bibliographical note

Funding Information:
The research leading to these results has received funding from the European Union Seventh Framework Programme ([FP7/2007-2013] [FP7/2007-2011]) under grant agreement 316657 (SpinIcur).

Funding Information:
D C Leitao acknowledges financial support through FSE/ POPH. INESC-MN acknowledges FCT funding through the IN Associated Laboratory.

Publisher Copyright:
© 2017 IOP Publishing Ltd.

Keywords

  • oxides
  • pulsed laser deposition
  • spintronics
  • superconductivity
  • thin films

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