Open volume defects and magnetic phase transition in Fe60Al40 transition metal aluminide
Open volume defects and magnetic phase transition in Fe60Al40 transition metal aluminide
Liedke, M. O.; Anwand, W.; Bali, R.; Cornelius, S.; Butterling, M.; Trinh, T. T.; Wagner, A.; Salamon, S.; Walecki, D.; Smekhova, A.; Wende, H.; Potzger, K.
Abstract
Magnetic phase transition in the Fe60Al40 transition metal aluminide from the ferromagnetic disordered A2-phase to the paramagnetic ordered B2-phase as a function of annealing up to 1000°C has been investigated by means of magneto-optical and spectroscopy techniques, i.e., Kerr effect, positron annihilation and Mössbauer spectroscopy. The positron annihilation spectroscopy (PAS) has been performed in-situ sequentially after each annealing step at the Apparatus for In-situ Defect Analysis (AIDA) that is a unique tool combining positron annihilation spectroscopy with temperature treatment, material evaporation, ion irradiation, and sheet resistance measurement techniques. The overall goal was to investigate importance of the open volume defects onto the magnetic phase transition. No evidence of variation in the vacancy concentration in matching the magnetic phase transition temperature range (400-600°C) has been found, whereas higher temperatures showed an increase in the vacancy concentration.
Keywords: FeAl; transition metal aluminides; open volume defects; AIDA; SPONSOR; phase transition; annealing; XRD; CEMS; MOKE; PAS
Beteiligte Forschungsanlagen
- Strahlungsquelle ELBE DOI: 10.17815/jlsrf-2-58
- P-ELBE
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 21702) publication
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Journal of Applied Physics 117(2015), 163908
DOI: 10.1063/1.4919014
Cited 60 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-21702