Dresden 2006 – wissenschaftliches Programm
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MA: Magnetismus
MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)
MA 20.27: Poster
Dienstag, 28. März 2006, 15:15–19:15, P1
Structural properties of Fe3Si thin films — •K. Trounov1,2, W. Keune1, M. Walterfang1, N. Utochkina1, and A. Trounova3 — 1Angewandte Physik, Universität Duisburg-Essen, 47048 Duisburg — 2new address: Angewandte Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum — 3Experimentalphysik, Universität Duisburg-Essen, 47048 Duisburg
Fe3Si alloy thin films with the D03 structure are candidates for soft ferromagnetic contacts with high spin polarization in spin injection devices.
Fe3Si thin films were prepared under MBE conditions by codeposition of Fe and Si onto various substrates (Si(100), MgO(100), NaCl(100) and KCl(100)) held at 130 K. The structural properties were determined by x-ray diffraction (XRD), transmission electron microscopy (TEM) and Mössbauer spectroscopy (57Fe-CEMS). Our results demonstrate that Fe3Si films prepared on substrates with a lattice parameter similar to that of Fe3Si (e.g. Si(100) and NaCl(100)) grow in the crystalline B2 structure, while Fe3Si films on MgO(100) and KCl(100) substrates (with a lattice parameter deviating from that of Fe3Si) grow in the amorphous structure.
Sponsored by DFG (GRK 277 und Ke 273/18-1).