Berlin 2008 – scientific programme
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MA: Fachverband Magnetismus
MA 32: Postersession II: Spinstruct./Phase Trans. (1-10); Spinelectronics (11-15); Thin Films (16 - 36); Particles/Clusters (37-45); Multiferroics (46-54); Spindynamics/Spin Torque (55 - 76); Post Deadlines (77-79)
MA 32.78: Poster
Friday, February 29, 2008, 11:15–14:00, Poster E
Spin structure in PLD-grown Fe films on Cu(001) in- and out-of-plane magnetic profile from soft x-ray resonant magnetic reflectivity — J.-M. Tonnerre1, Y. Gabi1, H. C. N. Tolentino1, H. L. Meyerheim2, F. Yildiz2, X. L. Fu2, •M. Przybylski2, A. Ramos3, E. Bontempi3, U. Staub4, and J. Kirschner2 — 1Institut Neel, CNRS and Universite Joseph Fourier, B.P 166, 38042 Grenoble, France — 2Max-Plank-Institut für Mikrostrukturphysik, 06120 Halle, Germany — 3Universita di Brescia, via Branze, 25123 Brescia, Italy — 4Swiss Light Source, Paul Scherrer Institut, 5232 Villigen, Switzerland
X-ray resonant magnetic reflectivity in the soft x-ray range (SXRMR) allows the investigation of the magnetic profile in thin films with chemical and orbital selectivity. We investigated the spin reorientation transition in pulsed laser deposited (PLD) Fe films on Cu(001). Three samples were prepared (4, 6 and 8 monolayers (ML) thick) capped by 3 nm of Au. From magneto-optic Kerr effect (MOKE) measurements it is known that at 160 K the 4 ML sample exhibits an in-plane easy magnetization axis while out-of-plane easy axis is found for 8 ML. At 6 ML coverage both in-plane and out-of-plane hysteresis loops are found. The SXRMR experiments were carried out at the Swiss Light Source (SLS). The photon energy dependent dichroic difference I+−I− and the asymmetry ratio R=(I+−I−)/(I++I−) were collected in the vicinity of the Fe L2,3 edges either by reversing the helicity of the light or the applied magnetic field. While for the 4 ML film in-plane ferromagnetic order is derived, the spectra for the 6 and 8 ML films can be interpreted by a noncollinear spin structure.