Open volume defects and magnetic phase transition in Fe{sub 60}Al{sub 40} transition metal aluminide

Journal Article · Tue Apr 28 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4919014· OSTI ID:22402914

Anwand, W.; Butterling, M.; Wagner, A. ^[1]; Bali, R.; Cornelius, S.; Potzger, K. ^[2]; Trinh, T. T. ^[1]; Salamon, S.; Walecki, D.; Smekhova, A.; Wende, H. ^[3]

---

1. Institute of Radiation Physics, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden (Germany)
2. Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstraße 400, 01328 Dresden (Germany)
3. Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstraße 1, 47048 Duisburg (Germany)

Magnetic phase transition in the Fe{sub 60}Al{sub 40} 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 has been performed in-situ sequentially after each annealing step at the Apparatus for In-situ Defect Analysis 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 the 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.

• OSTI ID: 22402914
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ALUMINIUM
ANNEALING
ANNIHILATION
CONCENTRATION RATIO
EVAPORATION
INTERMETALLIC COMPOUNDS
IRON
IRRADIATION
KERR EFFECT
MAGNETO-OPTICAL EFFECTS
MOESSBAUER EFFECT
PARAMAGNETISM
POSITRONS
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
VACANCIES