Regensburg 2013 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 12: Poster 1

DF 12.61: Poster

Dienstag, 12. März 2013, 10:30–13:30, Poster D

Origin of the Giant Magnetocaloric effect — •Prasenjit Roy¹, Gilles A de Wijs¹, and Robert A de Groot^1,2 — ¹Electronic Structure of Materials, Radboud University Nijmegen, Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands — ²Laboratory of Chemical Physics, Zernike Institute of Advanced Materials, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands

Adiabatic demagnetization as tool for refrigeration at room temperature has been studied extensively over the past decade. Recently the origin of the colossal magneto-caloric effect has been discovered by electronic structure calculations: the coexistence of weak and strong magnetism in one compound: mixed magnetism. Current research focuses on the study of the relation between structure, chemical composition and details of the mixed magnetism in the MnFePSi systems, with emphasis on the behavior of the weakly magnetic part of the compounds.