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

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

doi:10.1088/1361-648X/aa9a9d

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 journal › Article › Academic › peer-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 language	English
Article number	015804
Journal	Journal of Physics: Condensed Matter
Volume	30
Issue number	1
DOIs	https://doi.org/10.1088/1361-648X/aa9a9d
Publication status	Published - 10 Jan 2018
Externally published	Yes

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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10.1088/1361-648X/aa9a9d

Cite this

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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.",

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AU - Knudde, S.

AU - Leitao, D.C.

AU - Cardoso, S.

AU - Blamire, M.G.

N1 - 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.

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AB - 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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KW - pulsed laser deposition

KW - spintronics

KW - superconductivity

KW - thin films

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ER -

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

Abstract

Bibliographical note

Keywords

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