Berlin 2015 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 36: Poster Session I
DS 36.36: Poster
Donnerstag, 19. März 2015, 09:30–12:00, Poster A
Magnetic and structural studies of as grown and hydrogenated Mg2Fe based thin films — •Thu Trang Trinh1, Oscar Liedke1, Wolfgang Anwand1, Andreas Wagner1, Oguz Yilidirim2, Steffen Cornelius2, Bernard Dam3, Kohta Asano4, and Kay Potzger2 — 1Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf e.V. , D-01328 Dresden, Germany — 2Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf e.V. , D-01328 Dresden, Germany — 3Chemical Engineering, Delft University of Technology, 2628 BL Delft, Netherlands — 4Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8565, Japan
Due to chemochromism, Mg2MeHx (Me=Fe, Co, Ni) based alloys are low-cost and rare-earth-free candidates for switchable mirrors upon hydrogen loading [1]. In order to understand the basic physical properties of Mg2FeH6 based thin films, as-sputtered metal as well as hydrogen loaded films have been investigated using magnetometry, X-ray diffraction, 4-point probe sheet resistance technique and positron annihilation spectroscopy (PAS). The interplay of hydrogen loading, the magnetic moment, and structural properties like the sizes and chemical decoration of open volume defects in thin films detected by PAS will be presented.