Europhys. Lett.
Volume 63, Number 6, September 2003
Page(s) 819 - 825
Section Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics
Published online 01 November 2003
DOI: 10.1209/epl/i2003-00598-7
Europhys. Lett., 63 (6) , pp. 819-825 (2003)

Probing interface magnetism in the $\chem{FeMn/NiFe}$ exchange bias system using magnetic second-harmonic generation

L. C. Sampaio1, 2, A. Mougin2, J. Ferré2, P. Georges3, A. Brun3, H. Bernas4, S. Poppe5, T. Mewes5, J. Fassbender5 and B. Hillebrands5

1  Centro Brasileiro de Pesquisas Fisicas - Rua Dr. Xavier Sigaud 150 Urca Rio de Janeiro, RJ 22.290-180, Brazil
2  Laboratoire de Physique des Solides, UMR CNRS 8502 Bât. 510, Université Paris Sud - 91405 Orsay, France
3  Laboratoire Charles Fabry de l'Institut d'Optique Théorique et Appliquée (IOTA) UMR CNRS 8501, Bât. 503, Université Paris Sud - 91405 Orsay, France
4  Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, UMR CNRS 8609 Bât. 108, Université Paris Sud - 91405 Orsay, France
5  Fachbereich Physik, Universität Kaiserslautern - Erwin Schrödinger Str. 56 67663 Kaiserslautern, Germany

(Received 18 March 2003; accepted in final form 3 July 2003)

Second-harmonic generation magneto-optic Kerr effect (SHMOKE) experiments, sensitive to buried interfaces, were performed on a polycrystalline $\chem{FeMn/NiFe}$ bilayer in which areas with different exchange bias fields were prepared using 5 $\un{keV}$ $\chem{He}$ ion irradiation. Both reversible and irreversible uncompensated spins, localized and measured in the antiferromagnetic layer close to the interface with the ferromagnetic layer, are related to the exchange bias field.

42.65.-k - Nonlinear optics.
33.55.Fi - Other magnetooptical and electrooptical effects.
75.70.-i - Magnetic properties of thin films, surfaces, and interfaces.

© EDP Sciences 2003