Magnetic Migration Delays in Fe-Based Amorphous Alloys
P. Pietrusiewicza, M. Nabiałeka, K. Błocha, B. Jeżb, S. Waltersc, A.V. Sandud, e, f, M.M.A.B. Abdullahg, h
aDepartment of Physics, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
bDepartment of Technology and Automation, Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, Al. Armii Krajowej 19c, 42-200 Czestochowa
cAdvanced Engineering Centre, University of Brighton, BN2 4GJ, Brighton, United Kingdom
dFaculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iaşi, Boulevard D. Mangeron, No. 51, 700050 Iasi, Romania
eRomanian Inventors Forum, Str. P. Movila 3, 700089 Iasi, Romania
fNational Institute for Research and Development for Environmental Protection INCDPM, 294 SplaiulIndependentei, 060031 Bucharest, Romania
gFaculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), Kompleks Pusat Pengajian Jejawi 3, Kawasan Perindustrian Jejawi, 02600, Arau, Perlis, Malaysia
hCentre of Excellent on Geopolymer and Green Technology (CeGeoGTech), Universiti Malaysia Perlis (UniMAP), Kompleks Pusat Pengajian Jejawi 2, Taman Muhibbah, 02600, Arau, Perlis, Malaysia
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The amorphous state is characterized by metastability, which results in structural relaxation even at low temperatures. These relaxations contribute to the magnetic properties of amorphous alloys, such as the value of the coercive field, losses from hysteresis or magnetic susceptibility. In amorphous materials, as opposed to crystalline ones, the description of relaxation phenomena is difficult due to the fact that these processes are described by the activation energy spectrum and occur in a wide temperature range. The paper presents the results of the analysis of migration processes based on the adopted H. Kronmüller model, in which the reorientation of atoms takes place in areas of reduced volume called free volumes.

DOI:10.12693/APhysPolA.142.32
topics: magnetic susceptibility disaccommodation, activation energy of elementary processes, bulk amorphous alloys, structural relaxation