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Direct dynamical coupling of spin modes and singlet Josephson supercurrent in ferromagnetic Josephson junctions
Abstract : Via a direct coupling between the order parameter and the singlet Josephson supercurrent we detect spin-wave resonances and their dispersion in ferromagnetic Josephson junctions in which the usual insulating or metallic barrier is replaced with a weak ferromagnet. The coupling arises within the Fraunhofer interferential description of the Josephson effect because the magnetic layer acts as a time-dependent phase plate. A spin-wave resonance at a frequency omega(s) implies a dissipation that is reflected as a depression in the current-voltage curve of the Josephson junction when h omega(s)=2eV. We have thereby performed a resonance experiment on only 10(7) Ni atoms.
https://hal-polytechnique.archives-ouvertes.fr/hal-01068385
Contributor : Gaëlle Bruant Connect in order to contact the contributor
Submitted on : Thursday, September 25, 2014 - 3:43:25 PM
Last modification on : Tuesday, June 22, 2021 - 3:43:16 AM
Contributor : Gaëlle Bruant Connect in order to contact the contributor
Submitted on : Thursday, September 25, 2014 - 3:43:25 PM
Last modification on : Tuesday, June 22, 2021 - 3:43:16 AM
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