Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)
MA 63.64: Poster
Freitag, 18. März 2011, 11:00–14:00, P2
(contribution withdrawn) HIGH ENERGY X-RAY DIFFRACTION MEASUREMENTS ON Gd0.5Sr0.5MnO3 — •Dinesh Kumar Shukla1, Sonia Francoual1, Martin von Zimmermann1, Jörg Strempfer1, Aditya Avinash Wagh2, P S Anil Kumar2, Suja Elizabeth2, and H L Bhat2 — 1Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, Hamburg, 22603, Germany — 2Department of Physics, Indian Institute of Science, Bangalore, 560012, India
We report on high-energy (100 keV) x-ray diffraction measurements in high magnetic fields on Gd0.5Sr0.5MnO3. This system is reported to have a charge ordered state below 90 K and a spin glass behaviour below 42 K. The experiment was performed at the high energy x-ray diffraction beamline BW5 at DORIS. A cryo cooled 10 T magnet was used with temperatures reaching down to 2 K. Superstructure peaks at (h±1/2, k±1/2, 0) and (0, 2k+1, 0) positions are observed. There is no evidence of magnetic peaks along (0 1 0) or (1 0 0), down to 1.7 K as observed for GdMnO3. At 35 K, integrated intensity of the superstructure peaks increases with increasing field above the critical field of 8.5 T. The exact origin of the superstructure peaks is under investigations.