Regensburg 2013 – scientific programme
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MA: Fachverband Magnetismus
MA 25: Magnetic Heusler Compounds
MA 25.1: Talk
Wednesday, March 13, 2013, 09:30–09:45, H10
Crystal growth of Co2CrxFe1−xAl Heusler compounds — •Ahmad Omar, Maria Dimitrakopoulou, Christian George Friedrich Blum, Horst Wendrock, Steven Rodan, Silke Hampel, Wolfgang L öser, Bernd B üchner, and Sabine Wurmehl — Leibniz Institute for Solid State and Materials Research, D-01171 Dresden, Germany
Heusler compounds find extensive application as materials for magnetic tunnel junctions and memory devices as many are predicted to be half-metallic ferromagnets and hence have much potential in spintronics. Unfortunately, data for thin films as well as bulk materials for many compositions are fraught with anomalies. The present work primarily highlights crystal growth of select Heusler compounds (Co2CrxFe1−xAl) as an attempt towards understanding the interplay between the structure and intrinsic properties. We have used the Optical Floating Zone technique for the growth process. Apart from a phase segregation in the as cast samples, a spinodal decomposition of the grown samples has been observed for compounds containing Cr. The extent and the effect of the spinodal decomposition has also been studied.