Dresden 2003 – wissenschaftliches Programm
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MA: Magnetismus
MA 3: Magnetische Materialien
MA 3.1: Vortrag
Montag, 24. März 2003, 10:15–10:30, HSZ/401
X-ray spectroscopy of magnetic oxides — •L. H. Tjeng1, Di-Jing Huang2, N. B. Brookes3, G. Ghiringhelli4, P. G. Steeneken5, G. A. Sawatzky6, and C. T. Chen2 — 1II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln — 2SRRC, Taiwan — 3ESRF, Grenoble — 4Politecnico Milano — 5RU Groningen — 6University of British Columbia
Recent advancements in soft-x-ray beamline optics and undulator technology in the most modern synchrotron radiation research facilities have opened up new opportunities for the study of strongly correlated electron systems. Especially photon hungry spectroscopies like spin resolved photoemission benefit from these developments. In this talk I would like to present examples, in which one combines this technique with the use of various resonance conditions, in order to unravel the spin and multiplet states in the conduction band of certain ferromagnetic oxides, thereby revealing new information that otherwise is difficult to obtain. The examples discussed include the ferromagnet EuO with its spectacular metal-insulator transition and colossal magneto resistance, as well as the prototype half-metallic ferromagnet CrO2.
This work is supported by the DFG within the SFB 608.