Journal Article

PreJuSER-5452

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Observation of Josephson coupling through an interlayer of antiferromagnetically ordered chromium

Weides, M.FZJ* ; Disch, M.FZJ* ; Kohlstedt, H.FZJ* ; Buergler, D.FZJ*

2009
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/11037  doi:10.1103/PhysRevB.80.064508

Abstract: The supercurrent transport in metallic Josephson tunnel junctions with an additional interlayer made up by chromium, being an itinerant antiferromagnet, was studied. Uniform Josephson coupling was observed as a function of the magnetic field. The supercurrent shows a weak dependence on the interlayer thickness for thin chromium layers and decays exponentially for thicker films. The diffusion constant and the coherence length in the antiferromagnet were estimated. The antiferromagnetic state of the barrier was indirectly verified using reference samples. Our results are compared to macroscopic and microscopic models.

Keyword(s): J ; aluminium compounds (auto) ; antiferromagnetic materials (auto) ; chromium (auto) ; coherence length (auto) ; diffusion (auto) ; Josephson effect (auto) ; metallic thin films (auto) ; multilayers (auto) ; niobium (auto) ; superconducting thin films (auto)

Note: We thank A. Ustinov for stimulating discussion and D. Sprungmann for help with sample fabrication. M. W. was supported by the DFG under Project No. WE 4359/1-1 and the AvH foundation.

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Contributing Institute(s):

1. Elektronische Materialien (IFF-6)
2. Elektronische Eigenschaften (IFF-9)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2009

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