4.5 Article

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

期刊

出版社

IOP PUBLISHING LTD
DOI: 10.1088/1361-648X/aa9a9d

关键词

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

资金

  1. European Union Seventh Framework Programme ([FP7]) (SpinIcur) [316657]
  2. FSE/POPH
  3. FCT through the IN Associated Laboratory

向作者/读者索取更多资源

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.

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