Long-range supercurrents through half-metallic ferromagneticCrO2 | Zendy

Muhammad Shahbaz Anwar | Zendy; Franz D. Czeschka | Zendy; M. Hesselberth | Zendy; M. Porcu | Zendy; J. Aarts | Zendy

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Long-range supercurrents through half-metallic ferromagneticCrO2

Author(s) -

Muhammad Shahbaz Anwar,

Franz D. Czeschka,

M. Hesselberth,

M. Porcu,

J. Aarts

Publication year - 2010

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.82.100501

Subject(s) - superconductivity , condensed matter physics , ferromagnetism , sapphire , physics , metal , materials science , amorphous solid , field (mathematics) , crystallography , optics , chemistry , laser , mathematics , pure mathematics , metallurgy

We report on measurements of supercurrents through the half-metallic ferromagnet CrO2 grown on hexagonal Al2O3 (sapphire). The current was observed to flow over a distance of 700 nm between two superconducting amorphous Mo70Ge30 electrodes which were deposited on the CrO2 film. The critical current Ic increases as function of decreasing temperature. Upon applying an in-plane magnetic field, Ic goes through a maximum at the rather high field of 80 mT. We believe this to be a long-range proximity effect in the ferromagnet, carried by odd-frequency pairing correlations.Kavli Institute of NanoscienceApplied Science

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