Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.81: Poster
Dienstag, 8. März 2016, 09:30–12:30, Poster B1
Growth and characterization of β-Mn-type Co8Zn8Mn4−xFex polycrystals — •Kai Dietze, Justus Christinck, Nico Steinki, Stefan Süllow, and Dirk Menzel — Institut für Physik der Kondensierten Materie, Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany
In the ongoing research in spintronics, materials hosting magnetic skyrmions are getting more and more interesting due to the possible use of data storage and processing abilities. Generally, skyrmions are present in the magnetically ordered phase close to the ordering temperature far beneath 300 K. On the basis of their lacking inversion symmetry, some substitutes of β-Mn-type Co10Zn10 show promising characteristics for skyrmions above room-temperature. Lorentz transmission electron microscopy has indicated the presence of skyrmions in Co8Zn8Mn4 around 345 K [1]. In our studies we focus on the crystal growth of Co8Zn8Mn4−xFex samples and have performed a basic characterization. X-ray powder diffraction in combination with Rietveld-analysis confirms the β-Mn structure. SQUID magnetization and elevated-temperature resistivity measurements were performed in order to obtain information about the electronic and magnetic structure and specify the degree of purity.
[1] Y. Tokunaga et al., Nat. Commun. 6, 7638 (2015).