| NUKLEONIKA 2013, 58(1):113-116
PHASE CONSTITUTION OF AN LaFe11.0Co0.8(Si0.4Al0.6)1.2 ALLOY INVESTIGATED BY MOSSBAUER SPECTROSCOPYPiotr Gębara, Piotr Pawlik, Jerzy J. Wysłocki, Małgorzata Szwaja Częstochowa University of Technology, Faculty of Processing Materials, Technology and Applied Physics, Institute of Physics, 19 Armii Krajowej Str., 42-200 Częstochowa, Poland In the present work the phase constitution and magnetic ordering of the magnetocaloric LaFe11.0Co0.8(Si0.4Al0.6)1.2 alloy in the as-cast state and after annealing at 1323 K for 1 h (in case of ribbons) and 49 days (in case of bulk) were studied. For bulk and ribbon samples in as-cast state three crystalline phases were identified: dominant ferromagnetic alpha-Fe, minor ferromagnetic La(Fe,Co)Si and traces of paramagnetic La(Fe,Si)13 phase. Appropriate heat treatment resulted in the evolution of phase constitution of the alloy, where two crystalline phases were developed: the dominant paramagnetic La(Fe,Si)13 phase and a minor fraction of the ferromagnetic alpha-Fe for both bulk and ribbon samples. Close X |