Regensburg 2016 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 26: Poster session II
MM 26.29: Poster
Dienstag, 8. März 2016, 18:30–20:30, Poster B3
Mg2Fe(x)Si(1-x) - hydride: The interplay between, defects, structure and magnetic properties — •Thu Trang Trinh1,2, Oguz Yildirim1, Oskar Liedke1, Wolfgang Anwand1, Andreas Wagner1, Kohta Asano3, Bernard Dam4, and Kay Potzger1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany — 2Dresden University of Technology, Helmholtzstrasse 10, 01069 Dresden, Germany — 3Energy Technology Research Institute, Ibaraki 305-8565, Japan — 4Delft University of Technology, 2628 BL Delft, Netherlands
Mg2Fe hydride belongs to the most promising candidates for application as light weight storage material in a future hydrogen economy. Recently, it has also been shown that due to chemochromism, Mg2Fe is a low-cost and rare-earth-free candidate for switchable mirrors upon hydrogen loading. Besides the Mg2Fe hydride, a new compound of Mg2(FeSi) will be presented. The additional content of Si promises an optimization of hydrogen absorption and desorption processes. The Fe component of the system makes it an interesting material in terms of magnetic applications. Comprehensive investigations on Mg2(FeSi) system showed that hydrogen induced changes in structure, electronic, optical and magnetic properties. E g., volume magnetic properties transform from superparamagnetism to ferromagnetism with a high Curie temperature. In order to understand the basic physical properties of Mg2(FeSi) thin films and its hydride the present studies involve fundamental research and defect analysis.