Masrakova N. K.1,2, Pudonin F. A.1, Sherstnev I. A.1, Boltaev A. P.1, Kostsov D. S.1
1Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia
2National University of Science and Technology MISiS, Moscow, Russia
Email: shersntevia@lebedev.ru
Optical properties of five-layer structure Nb-FeNi-Nb-FeNi-Nb were studied with different thicknesses of FeNi and Nb layers grown in geometry of Stern-Gerlach effect. A non-linear dependence was found between dielectric permittivity and Nb thickness, which may be related to the behavior of exchange interaction between FeNi layers. Besides, in these structures there is also an effect of optical nonreciprocity found, the value of which strongly depended on both the thickness of FeNi magnetic layers and the distance between FeNi layers. It was detected that in the studied systems Nb-FeNi two orientations of a unidirectional axis of anisotropy may exist: one for the FeNi layers and the other one for Nb. The most promising parameters were determined for the periodical structures Nb-FeNi to study the optical properties. Keywords: thin film, island film, Stern-Gerlach effect, dielectric permittivity, nonreciprocity, anisotropy.
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