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Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 91: [MA] Poster II

O 91.3: Poster

Freitag, 30. März 2012, 11:00–14:00, Poster A

Magneto-optical characterization of single crystalline Co2FeAl0.4Si0.6 thin films on MgO substrates — •Ana Ruiz Calaforra1, Andres Conca1, Britta Leven1, Tanja Graf2,3, Frederick Casper2, Claudia Felser2,4, and Burkard Hillebrands11FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany — 3Graduate School of Excellence - Material Science in Mainz, 55099 Mainz, Germany — 4Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany

The full Heusler compound Co2FeAl0.4Si0.6 (CFAS) has been predicted to provide a 100% spin polarization with an enhanced temperature stability due to the fact that the Fermi level lies in the middle of the energy gap. Therefore, this material is a promising candidate for TMR- and GMR-devices. For this, the understanding of the magnetic properties of these compounds is of great importance. We present magneto-optical investigations on epitaxial thin CFAS films deposited on MgO (100) substrates with different seed layer materials. A magneto-optical Kerr effect setup with a rotational stage was used to study the magnetocrystalline anisotropy of the sample. An overall uniaxial anisotropy with a biaxial contribution strongly depending on the nature of the used seed layer was observed.

Support by the BMBF project MultiMag (VDI-TZ 13N9913) is acknowledged.

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