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MA: Fachverband Magnetismus
MA 18: Magnetic Thin Films II
MA 18.3: Vortrag
Mittwoch, 24. März 2010, 15:45–16:00, H3
Low Temperature FMR study of Ultra Thin Au/Fe/GaAs Samples — •Abdullah Kocbay1, Ramazan Topkaya1, Sinan Kazan1, Bekir Aktas1, Kubra Marhan1, Bartek Kardasz2, and Bret Heinrich2 — 1Gebze Institute of Technology, 41400 Gebze-Kocaeli, Turkey — 2Simon Fraser University, British Columbia V5A 1S6, Canada
The interest in ultrathin magnetic multilayers has been steadily increasing since they are building blocks in spintronics applications such as data storage devices and magnetic random access memories. Molecular beam epitaxially grown Fe on GaAs(001) capped by Au overlayer with variable thickness had been investigated by ferromagnetic resonance (FMR) and vibrating sample magnetometer (VSM). FMR measurements were carried out using a Bruker X-Band EMX spectrometer with a microwave frequency of 9.5 GHz by sweeping the magnetic field from 0 to 2 kOe. The temperature dependence of FMR spectra was recorded from 5 K to 300 K. The samples were placed on the sample-holder in conventional in-plane geometries. (both DC and microwave magnetic fields always lie in the film plane). We have recorded the FMR data in the conventional in-plane geometry for some specific crystallographic axis such as static magnetic field were aligned parallel to the hard axis and easy axis of uniaxial magnetocrystalline anisotropy and 45 degrees from the hard axis respectively. Magnetization measurements of the samples were carried out using a physical property measurement system (PPMS) by Quantum Design.