Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.66: Poster

Dienstag, 8. März 2016, 09:30–12:30, Poster B1

Search for magnetocaloric materials in the Co-Mn-Si system — •Franziska Seifert, Christian G.F. Blum, Bruno Weise, Anja Waske, Martin Knupfer, Bernd Büchner, and Sabine Wurmehl — Leibniz Institute for Solid State and Materials Research

Materials, which show a large magnetocaloric effect are interesting for modern cooling systems. One way to obtain a particularly large effect is by means of a magnetic phase transition. Some materials show a meta-magnetic transition (e.g. antiferromagnetic to ferromagnetic) with related large entropy changes. In this study we were able to find such a meta-magnetic transition in the Co-Mn-Si system. For this aim we prepared a sample series Co_2−xMn_1+xSi between the ferromagnetic Co₂MnSi and the antiferromagnetic Mn₃Si parent compound by changing the Co-Mn ratio. In some samples the MnCoSi phase is present, which might play an important role for structural and magnetic properties in that series.