Berlin 2015 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 25: Magnetic Imaging
MA 25.9: Vortrag
Mittwoch, 18. März 2015, 11:30–11:45, H 1012
Investigation of magneto-optical anisotropy of epitaxial Bi-substituted rare-earth iron garnet films — •rajkumar patra1, h. richert2, n. du1, m. lindner3, r. holzhey3, m. rabung4, j. mccord5, m. matczak6, r. schäfer7, o. g. schmidt7, and h. schmidt1 — 1TU Chemnitz — 2MATESY GmbH — 3INNOVENT e.V. — 4IZFP Saarbrücken — 5University of Kiel — 6IFMPAN, Poland — 7IFW Dresden
Bi-substituted rare-earth iron garnet films were grown by liquid phase epitaxy [1]. Magnetooptical (MO) anisotropy of different garnet films was studied by VMOGE with a 0.4T octupole magnet [2]. The MO response is strongest in the composition dependent band gap region and has been modeled with a wavelength dependent, complex MO coupling constant [3]. The MO anisotropy of different garnet films with out-of-plane or in-plane easy axis of magnetization has been studied in the corresponding band gap region by VMOGE measurements by orbiting the magnetic field out-of-plane and in-plane. The differences in the observed MO anisotropy have been confirmed by Kerr microscopy and by Barkhausen Noise and Eddy Current Microscopy (BEMI) measurements. By modeling the VMOGE rotation data we can easily determine the direction of the saturation magnetization in dependence on the direction and amplitude of applied magnetic field. [1] P. Capper et al. (2010) Magneto-Optic Garnet Sensor Films: Preparation, Characterization, Application, in Crystal Growth Technology: Semiconductors and Dielectrics, Wiley, [2] K. Mok, H.S. et al. Rev. Sci. Instr. 82 (2011), [3] K. Mok, H.S. et al., J. Appl. Phys. 110 (2011)