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MA: Fachverband Magnetismus
MA 19: Poster I (Bio- and Molecular Magnetism/ Magnetic Particles and Clusters/ Micro- and Nanostructured Magnetic Materials/ Magnetic Materials/ Multiferroics/ Magnetic Shape Memory Alloys/ Electron Theory of Magntism/ Spincaloric Transport/ Magnetic Coupling and Exchange Bias/ Magnetization Dynamics/ Micromagnetism and Computational Magnetics)
MA 19.54: Poster
Tuesday, March 15, 2011, 10:45–13:00, P2
Magnetic structure of multiferroic GdMnO3 explored by Resonant Soft X-ray Scattering — •Enrico Schierle1, Victor Soltwisch1, Detlef Schmitz1, Andrey Malyuk2, Fabiano Yokaichiya2, Dimitri N. Argyriou2, and Eugen Weschke1 — 1Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany
In the orthorombic ReMnO3s (Re=Gd, Dy, Tb), ferroelectric polarization is induced by complex magnetic structures resulting in a strong coupling of the two ordering phenomena [1]. While the multiferroic properties are dominated by the cycloidal structure of Mn moments as established by neutron diffraction [2], there is growing evidence for a decisive role of ordering of the Re-4f moments as well. This has been highlighted by x-ray diffraction studies as a complementary tool [3,4]. Particularly, resonant soft x-ray scattering (RSXS) is well suited to study details on the magnetic structure in an element-specific way [4]. We studied the magnetic ordering of the Gd-4f spins of GdMnO3 in detail by RSXS, sheding new light on the possible mechanisms of multiferroicity. The experiment was performed using a very recently commissioned diffractometer for RSXS built at HZB.
[1] Kimura et al., Nature 426, 55-58 (2003)
[2] Kenzelmann et al., PRL 95, 087206 (2005)
[3] Prokhnenko et al., PRL 98, 057206 (2007)
[4] Schierle et al., PRL 105, 167207 (2010)