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Dresden 2014 – scientific programme

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MA: Fachverband Magnetismus

MA 55: Poster II

MA 55.103: Poster

Friday, April 4, 2014, 10:30–13:30, P2

The High-Field Multiferroicity of GdMnO3 and DyMnO3 explored by Resonant Soft X-Ray Scattering — •Enrico Schierle1, Victor Soltwisch1, Sven Landsgesell1, Fabiano Yokaichiya1, 2, Detlef Schmitz1, Andrej Maljuk1, 3, Ralf Feyerherm1, Dimitri Argyriou1, 4, and Eugen Weschke11Helmholtz-Zentrum Berlin — 2Laboratrio Nacional de Luz Sincrotron, Brasil — 3IFW, Dresden — 4ESS, Lund, Sweden

Some of the orthorhombic REMnO3 oxides are prototype single-phase multiferroic compounds characterized by a strong coupling of ferroelectric (FE) and magnetic order. This allows for magnetic control of FE polarization P [1] and magnetic response to applied electric fields [3]. The zero-field multiferroic phases, characterized by P along c, are well understood. Here, magnetic Mn cycloids induce P [3] but also RE order has been shown to have significant contributions[3-5]. Only little is known about the magnetic high field phases of these materials with FE P switched to show along a. We employed Resonant Soft X-Ray Scattering to explore the electronic ordering of the RE-4f and Mn-3d and its relation to ferroelectricity. We will compare the behavior observed for the Pa phases of DyMnO3 and GdMnO3 which show surprising differences. The study has been performed 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)

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