Berlin 2008 – scientific programme
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MA: Fachverband Magnetismus
MA 15: Magnetic Thin Films I
MA 15.10: Talk
Tuesday, February 26, 2008, 12:45–13:00, H 1012
The AFM-FM phase transition in FeRh investigated using XMCD — •Christian Stamm1, Christian Back2, Ilie Radu1,2, Jan-Ulrich Thiele3, Hermann A. Dürr1, and Wolfgang Eberhardt1 — 1BESSY, Albert-Einstein-Str. 15, 12489 Berlin — 2Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstr. 31, 93040 Regensburg — 3Hitachi Global Storage Technologies, 3403 Yerba Buena Road, San Jose, CA 95135, USA
The phase transition from antiferromagnetic to ferromagnetic ordering in FeRh is investigated in an element specific way by means of x-ray absorption spectroscopy. Dichroism sum rules allow us to determine spin and orbital moments of the two elements. Increasing the temperature from 300 to 450 Kelvin, the magnetic moments in Fe and Rh both evolve from zero to their final value, while the ratio of Rh to Fe moments stays constant. We attribute this to a coexistence of the AFM and FM phases.