Apparatus for In-situ Defect Analysis (AIDA)
Apparatus for In-situ Defect Analysis (AIDA)
Liedke, M. O.; Anwand, W.; Potzger, K.; Wagner, A.
A unique high vacuum system combining material evaporation and ion beam modication with positron annihilation spectroscopy (PAS) has been developed and installed in the Helmholtz-Zentrum Dresden-Rossendorf. The in-situ system is capable to perform Doppler broadening spectroscopy as well as resistometry (4 point probe). It is an end station of the Slow-Positron System of Rossendorf (SPONSOR) that provides a mono-energetic positron beam pre-accelerated in the range of 80 eV to 35 keV thus enabling sample depth proling. The main focus of studies is the in-situ modication (during growth, ion irradiation, cooling/annealing) and the analysis of open volume defects and the chemical environment in thin lms of, e.g., memristive oxides or metal alloys. First results on the FeAl ion irradiation/annealing driven magnetic phase transition between the paramagnetic and ferromagnetic state as a function of the open volume defects will be shown. The project is nanced by the Impuls- und Vernetzungsfonds of the Helmholtz Association (code VH-VI-442).
Keywords: MBE; ion irradiation; evaporation; annealing; FeAl; transition metals
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- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 21636) publication
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Lecture (Conference)
Treffen Deutscher Positronengruppen Kiel 2014, 25.-27.02.2014, Kiel, Deutschland
Permalink: https://www.hzdr.de/publications/Publ-21636
Publ.-Id: 21636