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Journal Article

Giant oscillatory Gilbert damping in superconductor/ferromagnet/superconductor junctions


Yu,  T.
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Yao, Y., Cai, R., Yu, T., Ma, Y., Xing, W., Ji, Y., et al. (2021). Giant oscillatory Gilbert damping in superconductor/ferromagnet/superconductor junctions. Science Advances, 7(48): eabh3686. doi:10.1126/sciadv.abh3686.

Cite as: https://hdl.handle.net/21.11116/0000-0009-9244-5
Interfaces between materials with differently ordered phases present unique opportunities for exotic physical properties, especially the interplay between ferromagnetism and superconductivity in the ferromagnet/superconductor heterostructures. The investigation of zero- and π-junctions has been of particular interest for both fundamental physical science and emerging technologies. Here, we report the experimental observation of giant oscillatory Gilbert damping in the superconducting niobium/nickel-iron/niobium junctions with respect to the nickel-iron thickness. This observation suggests an unconventional spin pumping and relaxation via zero-energy Andreev bound states that exist not only in the niobium/nickel-iron/niobium π-junctions but also in the niobium/nickel-iron/niobium zero-junctions. Our findings could be important for further exploring the exotic physical properties of ferromagnet/superconductor heterostructures and potential applications of ferromagnet π-junctions in quantum computing, such as half-quantum flux qubits.