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Dresden 2009 – scientific programme

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MA: Fachverband Magnetismus

MA 38: Multiferroics

MA 38.9: Talk

Thursday, March 26, 2009, 17:30–17:45, HSZ 103

X-ray diffraction studies on multiferroic RMnO3 compounds in high magnetic fields — •Jörg Strempfer1, Britta Bohnenbuck2, Ioannis Zegkinoglou2, Nadir Aliouane3, Dimitri N. Argyriou3, Alexander Krimmel4, and Martin von Zimmermann11HASYLAB at DESY, Notkestr. 85, 22603 Hamburg, Germany — 2MPI/FKF, Heisenbergstr. 1, Stuttgart, Germany — 3Helmholtz-Zentrum für Materialien und Energie, Glienicker Str. 100, Berlin, Germany — 4Experimentalphysik V, Universität Augsburg, Augsburg, Germany

Investigations of the multiferroic compounds TbMnO3, DyMnO3 and Y0.2Eu0.8MnO3 by x-ray diffraction in high magnetic fields, oriented along the a and b-directions of the crystal, are presented. The relation of the behaviour of first and second harmonic reflections to changes in ordering of the rare earth moments in applied field for TbMnO3 and DyMnO3 is discussed [1-3]. Observations below the ordering temperature of the rare earth moments without and with applied magnetic field suggests a strong interaction of the rare earth moments, the Mn moments and the lattice. Since structural first harmonic reflections are absent in Y0.2Eu0.8MnO3, these reflections in the other compounds reflect the ordering of the rare earth moments.

[1] N. Aliouane et al. Phys. Rev. B 73, 020102 (2006)

[2] J. Strempfer et al. Phys. Rev. B 75, 212402 (2007)

[3] J. Strempfer et al. Phys. Rev. B 78, 024429 (2008)

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