Regensburg 2010 – wissenschaftliches Programm

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KR: Fachverband Kristallographie

KR 10: Poster: Multiferroics (with MA, DF, KR, DS)

KR 10.41: Poster

Dienstag, 23. März 2010, 10:45–13:45, Poster A

Remanence enhancement and energy density in epitaxial exchange-coupled SmCo₅/Fe-Multilayers — •Simon Sawatzki, Felix Fleischhauer, Marietta Seifert, Ludwig Schultz, and Volker Neu — IFW Dresden, Institute for Metallic Materials, P.O. Box 270116, D-01071 Dresden, Germany

Exchange-coupled SmCo₅/Fe-multilayers have been epitaxially grown by pulsed laser deposition on Cr covered MgO(110) substrates, such that one single in-plane easy axis of the highly anisotropic SmCo₅ phase is realized through the whole layer stack. The phase formation and texture was confirmed by Bragg-Brentano X-ray diffraction and pole figure measurements. The magnetic properties were characterized by vibrating sample magnetometry. In order to maximize the energy density (BH)_max, as a key property for permanent magnet application, two series of samples were investigated. First, trilayers of SmCo₅/Fe/SmCo₅ with fixed SmCo₅ layer thickness (25 nm) and varying soft magnetic Fe film thickness have been prepared to analyze the impact of the Fe-volume fraction on remanence enhancement and coupling. In the second series SmCo₅/Fe alternating multilayer with constant Fe-volume fraction but reduzed single layer thickness were examined.