title: Experimental observation of the spin screening effect in superconductor/ferromagnet thin film heterostructures.
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.
authors.affiliation: Zavoisky Physical-Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences, 420029 Kazan, Russia.
authors.forename: R I
authors.initials: RI
authors.lastname: Salikhov
authors.forename: I A
authors.initials: IA
authors.lastname: Garifullin
authors.forename: N N
authors.initials: NN
authors.lastname: Garif'yanov
authors.forename: L R
authors.initials: LR
authors.lastname: Tagirov
authors.forename: K
authors.initials: K
authors.lastname: Theis-Bröhl
authors.forename: K
authors.initials: K
authors.lastname: Westerholt
authors.forename: H
authors.initials: H
authors.lastname: Zabel