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MA: Fachverband Magnetismus

MA 24: Magnetic Imaging and Scattering Techniques

MA 24.10: Vortrag

Mittwoch, 13. März 2013, 11:45–12:00, H22

Local symmetries and their effect on resonant magnetic scattering in YMn_2−xFe_xO₅ — •Sven Partzsch¹, Enrico Schierle², Jorge E. Hamann-Borrero¹, Eugen Weschke², Taichi Matsuda³, Hiroki Wadati³, Stuart B. Wilkins⁴, Dmitri Souptel¹, Bernd Büchner¹, and Jochen Geck¹ — ¹IFW Dresden — ²HZB Berlin — ³University of Tokyo — ⁴BNL Upton

Resonant magnetic x-ray scattering (RMXS) is a powerful experimental photon-in/photon-out probe to study the magnetic structure in an element specific way. The RMXS of a free atom is known and, in fact, this is very often used [1]. However, when a scatterer is embedded in a solid additional effects need to be considered [2].

We derive the scattering matrix of the Fe2 sites of YMn_2−xFe_xO₅ at the Fe L_2,3 edge from azimuth scans. The principle axes of the scattering matrix are strongly energy dependent because of the orthorhombic space group, the magnetic moments pointing in all three crystallographic directions and the strong anisotropic ligand field of the square pyramids.

[1] J. P. Hannon et al., PRL, 61, 1245 (1988)

[2] M. W. Haverkort et al., PRB, 82, 094403 (2010)