Open AccessThe effect of temperature and frequency on magnetic properties of the Fe81B13Si4C2 amorphous alloy
Author(s) -
Svetlana Djukic,
V.A. Maricic,
Aleksandra Kalezić-Glišović,
Lenka Ribić-Zelenović,
Sinisa Randjic,
Nebojša Mitrović
Publication year - 2011
Publication title -
science of sintering/science of sintering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 25
eISSN - 1820-7413
pISSN - 0350-820X
DOI - 10.2298/sos1102175d
Subject(s) - coercivity , materials science , annealing (glass) , isothermal process , amorphous solid , alloy , amorphous metal , permeability (electromagnetism) , kinetic energy , nuclear magnetic resonance , condensed matter physics , thermodynamics , metallurgy , crystallography , chemistry , biochemistry , physics , quantum mechanics , membrane
In this study it was investigated influence of temperature and frequency on permeability, coercivity and power loses of Fe81B13Si4C2 amorphous alloy. Magnetic permeability measurements performed in nonisothermal and isothermal conditions was confirmed that efficient structural relaxation was occurred at temperature of 663 K. This process was performed in two steps, the first one is kinetic and the second one is diffuse. Activation energies of these processes are: Ea1 = 52.02 kJ/mol for kinetic and Ea2 = 106.9 kJ/mol for diffuse. It was shown that after annealing at 663 K coercivity decrease about 30% and therefore substantial reduction in power loses was attained. Investigated amorphous alloy satisfied the criteria for signal processing devices that work in mean frequency domain