Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

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 Mg2FexSi1-x will be presented. The additional content of Si promises an optimization of hydrogen absorption and desorption processes. Comprehensive investigations at the facilities of HZDR on Mg2FexSi1-x system showed that hydrogen induced changes in structure, electronic, optical and magnetic properties. I.e., volume magnetic properties transform from superparamagnetism to ferromagnetism with a high Curie temperature.
As a member of the Helmholtz Association, HZDR provides a unique infrastructure for researchers. Large scale research facilities, i.e. the ion beam center and the linear electron accelerator ELBE of the HZDR are also briefly presented. A suite of materials analysis techniques based on ion beams and the generated radiation of the electron beam is available. A few methods are introduced such as Rutherford Backscattering Spectrometry (RBS), Resonant Nuclear Reaction Analysis (NRA) and Positron annihilation spectroscopy (PAS), which enable the cross-disciplinary collaboration between researchers.