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Comparison of disorder induced by annealing and quench and by ball-milling in B2 FeCo

Authors: Loureiro, J. M.; Malaman, B.; Costa, B. F. O.; Le Caër, G.; Khomchenko, V. A.; Das, S.; Amaral, V. S.

Ref.: Phys. Stat. Sol. C 8 (11-12), 3087-3090 (2011)

Abstract: Order-disorder in FeCo are studied by X-ray diffraction, Mossbauer spectroscopy and saturation magnetization measurements in applied fields up to 10 T. Order is promoted by annealing at 550 degrees C and the alloy is disordered either by high-temperature annealing at 980 degrees C followed by a quench into cooled water or by ball-milling. A more disordered state is reached by ball-milling in our dynamical conditions than the one reported to be attained by annealing and quench even at rather high rates. A saturation magnetization as high as 2.51 mu B/at. is obtained. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI: 10.1002/pssc.201000776