Regensburg 2013 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 12: Poster 1

DF 12.9: Poster

Dienstag, 12. März 2013, 10:30–13:30, Poster D

Mechanisms of Multiferroicity of GdMnO₃ explored by Resonant Soft X-Ray Scattering in High Magnetic Fields — •Enrico Schierle¹, Victor Soltwisch¹, Christoph Trabant^1,2, Alex Frano^1,3, Sven Landsgesell¹, Fabiano Yokaichiya^1,4, Detlef Schmitz¹, Andrej Maljuk^1,5, Christian Schüßler-Langeheine¹, Ralf Feyerherm¹, Dimitri Argyriou^1,6, and Eugen Weschke¹ — ¹Helmholtz-Zentrum Berlin, Germany — ²Universität zu Köln, Germany — ³MPI-FKF Stuttgart, Germany — ⁴Laboratrio Nacional de Luz Sincrotron, Campinas-SP, Brasil — ⁵IFW, Dresden, Germany — ⁶ESS, Lund, Sweden

Several orthorhombic REMnO₃ oxides show strongly coupled ferroelectric (FE) and magnetic order, with FE polarization induced by Mn-spin cycloids[1,2]. There is now growing evidence for a decisive role of ordering of the RE-4f moments as well[3-5]. GdMnO₃ seems to be the prime candidate for multiferroicity connected with magnetic RE order[4]. We employed Resonant Soft X-Ray Scattering to explore the magnetic Gd-4f and Mn-3d spin order and its coupling to ferroelectricity. While the prominent features can be already observed in the Zero-field FE phase, detailed knowledge could be derived by studying the magnetic field stabilized FE phase using the High-Field-Diffractometer operated at the UE46-PGM-1 beam line at BESSY II.
[1] Kimura et al., Nature 426, 55-58 (2003) [2] Kenzelmann et al., PRL 95, 087206 (2005) [3] Schierle et al., PRL 105, 167207 (2010) [4] Feyerherm et al., Journal of Physics: Conference Series 200, 012032 (2010) [5] Walker et al., Science 333, 1273 (2011)