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

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 a...

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Vydané v:Journal of physics. Condensed matter Ročník 30; číslo 1; s. 015804 - 15810
Hlavní autori: Mesoraca, S, Knudde, S, Leitao, D C, Cardoso, S, Blamire, M G
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: England IOP Publishing 10.01.2018
Predmet:
oxides
pulsed laser deposition
spintronics
superconductivity
thin films
ISSN:0953-8984, 1361-648X, 1361-648X
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Shrnutí: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.
Bibliografia:JPCM-110314.R1
ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0953-8984
1361-648X
1361-648X
DOI:10.1088/1361-648X/aa9a9d