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Published on: March 24, 2019
Experimental observation of the spin screening effect in superconductor/ferromagnet thin film heterostructures
R I Salikhov1, I A Garifullin, N N Garif'yanov
1Zavoisky Physical-Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences, 420029 Kazan, Russia.
Abstract:
We have studied the nuclear magnetic resonance (NMR) of 51V nuclei in the superconductor/ferromagnet thin film heterostructures Pd_{1-x}Fe_{x}/V/Pd_{1-x}Fe_{x} and Ni/V/Ni in the normal and superconducting state. Whereas the position and shape of the NMR line in the normal state for the trilayers is identical to that observed in a single V layer, in the superconducting state the line shape definitely changes, developing a systematic distortion of the high-field wing of the resonance line. We consider this as the first experimental evidence for the penetration of ferromagnetism into the superconducting layer, a phenomenon which has been theoretically predicted recently and dubbed the spin screening effect.
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