Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 34: Poster Session
MM 34.13: Poster
Dienstag, 1. April 2014, 18:00–20:00, P4
In-situ tomography on the magnetostructural transition of La(Fe,Si)13 — •Anja Waske1, Bruno Weise1,6, Konstantin Skokov2, Stefan Schmiederer3,4, Alexander Rack3, Wolfgang Ludwig5, Oliver Gutfleisch2, and Jürgen Eckert1,6 — 1IFW Dresden, Institute for Complex Materials, Dresden, Germany, — 2TU Darmstadt, Department of Materials Science, Darmstadt, Germany, — 3European Synchrotron Radiation Facility, Grenoble, France, — 4University of Manchester, X-ray Imaging Facility, School of Materials, UK, — 5GEMPPM-MATEIS, INSA de Lyon, Lyon, France, — 6Institute of Materials Science, Dresden University of Technology, 01062 Dresden, Germany
Magnetocaloric material of the composition La(Fe,Si)13 shows a magnetostructural transition connected to a volume expansion of up to 1.5%, which can be induced either by applying a magnetic field or by lowering the temperature below the material's Curie temperature. We conducted a temperature dependent study of this magnetostructural transition to study how the nucleation of the low-temperature state proceeds in the sample as the temperature is lowered. Powderized and bulk samples were compared to study the influence of the neighbouring particles and the constraints those present for other particles (or grains) to transform.