DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 1998 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

DS: Dünne Schichten

DS 24: Postersitzung

DS 24.57: Poster

Thursday, March 26, 1998, 15:00–19:00, PF A

Interface Studies on Cr/Fe/Cr by Ferromagnetic Resonance and SQUID — •J. Pflaum1, J. Pelzl1, P. Bödeker1, H. Zabel1, M. Maryško2, P. Sturc2, and Z. Frait21Inst. für Experimentalphysik, Ruhr-Universität, 44780 Bochum, Germany — 2Institute of Physics, ASCR, CZ 18040, Praha 8, Czech Republic

The interface interaction between ferromagnetic Fe and antiferromagnetic Cr is studied by ferromagnetic resonance (FMR) technique at microwave frequencies of 9GHz to 69GHz and SQUID magnetometry. The MBE grown samples consist of 20Å bcc Fe(001) deposited on a Cr layer of variable thickness (30Å ≤ tCr≤ 12000Å). On the Fe a Cr cap-layer of a thickness of 20Å is grown to enable ex-situ analysis. Cooling the samples an increase of the coercive force as well as an anomalous behavior of the parameters determining the FMR line can be observed. On the basis of the present results we show that this behavior is related to a reorientation transition of the Cr moments from a transversal polarized spin-density wave to a longitudinal polarized spin-density wave. The transition temperature of this first order phase transition clearly shows a dependency on the Cr layer thickness and is suppressed for tCr≤60Å. Deviation from a 3D-Heisenberg-model is observed and can be mainly related to the occurrence of magnetic domains in Cr as well as to a clamping of a commensurate phase of the Cr spins located at the Fe/Cr-interface.
This work is supported by the DFG and Volkswagen Stiftung.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 1998 > Regensburg