Observation of Josephson coupling through an interlayer of antiferromagnetically ordered chromium

Details Observation of Josephson coupling through an interlayer of antiferromagnetically ordered chromium Observation of Josephson coupling through an interlayer of antiferromagnetically ordered chromium

2009-06-16

arxiv.org/abs/0906.2970v3

Phys. Rev. B 80, 064508 (2009)

Physics

Condensed Matter

Superconductivity

Phys. Rev. B (2009), in print

Scientific paper

10.1103/PhysRevB.80.064508

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.

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