Publikation: Experimental and theoretical study of field-dependent spin splitting at ferromagnetic-insulator-superconductor interfaces
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2022
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Beilstein Journal of Nanotechnology. Beilstein-Institut. 2022, 13, pp. 682-688. eISSN 2190-4286. Available under: doi: 10.3762/bjnano.13.60
Zusammenfassung
We present a combined experimental and theoretical work that investigates the magnetic proximity effect at a ferromagnetic-insulator - superconductor (FI-S) interface. The simulation is based on the boundary condition for diffusive quasiclassical Greens functions, that accounts for arbitrarily strong spin-dependent effects and spin-mixing angles. The experimentally found differential conductance of an EuS-Al heterostructure is compared with a theoretical calculation. With the assumption of a uniform spin-mixing angle that depends on the externally applied field, we find good agreement between theory and experiment. The theory depends only on very few parameters, mostly specified by the experimental setup. We determine the effective spin of the interface moments as J≈0.74ℏ.
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530 Physik
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circuit theory, magnetism, proximity effect, superconductivity, tunneling
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MACHON, Peter, Michael J. WOLF, Detlef BECKMANN, Wolfgang BELZIG, 2022. Experimental and theoretical study of field-dependent spin splitting at ferromagnetic-insulator-superconductor interfaces. In: Beilstein Journal of Nanotechnology. Beilstein-Institut. 2022, 13, pp. 682-688. eISSN 2190-4286. Available under: doi: 10.3762/bjnano.13.60BibTex
@article{Machon2022-03-18T13:43:15ZExper-57177.2,
year={2022},
doi={10.3762/bjnano.13.60},
title={Experimental and theoretical study of field-dependent spin splitting at ferromagnetic-insulator-superconductor interfaces},
volume={13},
journal={Beilstein Journal of Nanotechnology},
pages={682--688},
author={Machon, Peter and Wolf, Michael J. and Beckmann, Detlef and Belzig, Wolfgang},
note={Article Number: 10.3762}
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<dcterms:abstract xml:lang="eng">We present a combined experimental and theoretical work that investigates the magnetic proximity effect at a ferromagnetic-insulator - superconductor (FI-S) interface. The simulation is based on the boundary condition for diffusive quasiclassical Greens functions, that accounts for arbitrarily strong spin-dependent effects and spin-mixing angles. The experimentally found differential conductance of an EuS-Al heterostructure is compared with a theoretical calculation. With the assumption of a uniform spin-mixing angle that depends on the externally applied field, we find good agreement between theory and experiment. The theory depends only on very few parameters, mostly specified by the experimental setup. We determine the effective spin of the interface moments as J≈0.74ℏ.</dcterms:abstract>
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