Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 11: Magnetic Thin Films I

MA 11.8: Vortrag

Montag, 7. März 2016, 17:00–17:15, H33

Growth of epitaxial thin films of Ir-based novel double-perovskites by pulsed laser deposition — •Supratik Dasgupta, Vikas Shabadi, Philipp Komissinskiy, and Lambert Alff — Institute of Material Science, Technische Universität Darmstadt, Germany

Double perovskites (A₂BB′O₆) with 3d-5d cations in their B-B′-sites have various interesting properties. Double perovskites with Cr at their B-site have received particular attention due to their high ferrimagnetic ordering temperature, T_c. So far, Sr₂CrOsO₆ has been reported to have the highest T_c of about 725 K [1]. Theoretical calculations have predicted that the compound Sr₂CrIrO₆ (SICO) might even have a higher T_c. In addition to the high T_c, SICO is expected to be a half-metallic material being of high interest for spintronic applications. However, the metastable compound SICO so far has not yet been synthesized. Here, we report the epitaxial growth of SICO by pulsed laser deposition (PLD). The choice of substrate has turned out to be the key parameter to obtain phase-pure thin films. [1] Y. Krockenberger et al., Phys. Rev. B 75, 020404(R) (2007).