Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 24: Magnetic Imaging and Scattering Techniques
MA 24.11: Vortrag
Mittwoch, 13. März 2013, 12:00–12:15, H22
Multiple ordering phenomena in the magnetic metal SrCo6O11 — •Sven Partzsch1, Taichi Matsuda2, Hiroki Wadati2, Enrico Schierle3, Eugen Weschke3, Shintaro Ishiwata2, Yoshinori Tokura2, Bernd Büchner1, and Jochen Geck1 — 1IFW Dresden — 2University of Tokyo — 3HZB Berlin
SrCo6O11 has a layered hexagonal crystal structure and is a novel type of giant magnetoresistance system [1]. So far magnetic structures were studied only by powder neutron diffraction measurements [2], which revealed an a × a × 3c superstructure, consistent with the 1/3 magnetization plateau.
In this study we used single crystals of this material and performed resonant soft x-ray scattering (RSXS) to obtain more detailed magnetic structures. RSXS measurements were performed at the UE46-PGM1 beamline of BESSY II. At the Co L3 edge we observed the L=2/3, 1, 4/3 and 3/2 reflections in agreement with the neutron data [2]. But in addition there are reflections which can be decomposed into L=4/5, 5/6, and 6/7. This points to the “devil’s staircase” theoretically obtained from the simple axial next nearest neighbor Ising model.
[1] S. Ishiwata et al., Phys. Rev. Lett. 98, 217201 (2007)
[2] T. Saito et al., J. Magn. Magn. Mater. 310, 1584 (2007)