Dresden 2006 – wissenschaftliches Programm

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MA: Magnetismus

MA 29: Magnetic Thin Films IV

MA 29.4: Vortrag

Donnerstag, 30. März 2006, 16:00–16:15, HSZ 03

Coexistence of collinear and non-collinear magnetic domains in an [Er|Tb] superlattice — •Jörg Voigt, Emmanuel Kentzinger, Ullrich Rücker, Amitesh Paul, and Thomas Brückel — Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich

The off-specular neutron scattering from an [Er|Tb] superlattice reveals the correlation length of co-existing magnetic structures. From wide angle neutron diffraction, the phase diagram has been deduced earlier, showing commensurate und incommensurate correlations in the same temperature range T<60 K [1]. Polarized neutrons allow to distinguish between collinear ferromagnetic correlations and non-collinear helical correlations. We have studied the formation of the different domains as a function of magnetic field, temperature and magneto-thermal history of the sample.

[1] J.Voigt et al.,Europhys. Lett., 65 (4) , pp. 560-566 (2004)