Magnetic Properties of EuS-SrS Semiconductor Multilayer Structures

M. Szot a, L. Kowalczyk a, P. Deptuła a,b, V. Domukhovski a, V. Osinniy a, E. Smajek a, A. Szczerbakow a, A.Yu. Sipatov c, V.V. Volobuev c, A.G. Fedorov d and T. Story a a Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland b Department of Mathematics and Natural Sciences, College of Science, Cardinal S. Wyszyński University, Dewajtis 5, 01-185 Warsaw, Poland c National Technical University KPI, 21 Frunze Street, 61002 Kharkov, Ukraine d Institute for Scintillation Materials NASU, Lenin Ave. 60, 61001 Kharkov, Ukraine

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Received: 9 06 2007;

Magnetic and structural properties of EuS-SrS semiconductor multilayers were studied by SQUID and magneto-optical Kerr effect magnetometry techniques and by X-ray diffraction method. The multilayers composed of monocrystalline, lattice matched ferromagnetic EuS layers (thickness 35-50 Å) and nonmagnetic SrS spacer layers (thickness 45-100 Å) were grown epitaxially on KCl (001) substrates with PbS buffer layer. Ferromagnetic transition in EuS-SrS multilayers was found at the Curie temperature Tc=17 K. The multilayers exhibit only weak in-plane magnetic anisotropy with [110] easy magnetization axis. Coercive field of EuS-SrS multilayers shows a linear increase with decreasing temperature. Magneto-optical mapping of magnetic hysteresis loops of the multilayers revealed good spatial homogeneity of their magnetic properties.

DOI: 10.12693/APhysPolA.112.419 PACS numbers: 75.20.Ck, 75.30.Et