Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 55: Poster II

MA 55.103: Poster

Freitag, 4. April 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 Yokaichiya^{1, 2}, Detlef Schmitz¹, Andrej Maljuk^{1, 3}, Ralf Feyerherm¹, Dimitri Argyriou^{1, 4}, and Eugen Weschke¹ — ¹Helmholtz-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 P_a 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)