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Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 91: [MA] Poster II

O 91.65: Poster

Freitag, 30. März 2012, 11:00–14:00, Poster A

Thermomagnetic properties improved by self-organized flower-like phase separation of ferromagnetic Co2Dy0.5Mn0.5Sn. — •Michael Schwall1, Peter Klaer2, Hans-Joachim Elmers2, and Benjamin Balke11Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg - University, Mainz — 2Institute of Physics, Johannes Gutenberg - University, Mainz

A thermodynamically stable phase separation of Co2Dy0.5Mn0.5Sn into the Heusler compound Co2MnSn and Co8Dy3Sn4 is induced by rapid cooling from the liquid phase. The phase separation forms an ordered flower-like structure on the microscale. The increased scattering of phonons at the phase boundaries reduces thermal conductivity and thus improves thermoelectric and spincaloric properties.

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