Magnetic after-effect spectra analysis by applying the lognormal distribution of relaxation times

Time and Thermal Stability of Magnetic Properties in Fe_{61}Co_{10}Y_{8}Nb_{1}B_{20} Bulk Amorphous Alloys

“…According to twolevel model, the magnetic disaccommodation of initial susceptibility is usually attributed to reorientation of a mobile atom pair within a domain wall. The isochronal disaccommodation curves are decomposed, into three elementary processes each of them being delineated by the Gaussian distribution of relaxation times, by the method described elsewhere [7].…”

Magnetic Relaxations in Amorphous Fe_{61}Co_{10}Y_{8}Zr_{1}B_{20} Alloy

“…The isochronal disaccommodation curves are decomposed, into three elementary processes, each of them being delineated by the Gaussian distribution of relaxation times [5]. Finding the described processes, responsible for the total disaccomodation, is a result of the computer analysis (not of physical one).…”

“…The magnetic susceptibility disaccommodation, is one of the magnetic after-eect phenomenon, very sensitive to presence of structural changes [5,[7][8][9]. The aim of this paper is to study the inuence of annealing at 700 K for 1 h on the structural relaxations and stability of magnetic properties, determined from disaccommodation phenomenon studies for Fe 61 Co 10 Y 8 Zr 1 B 20 amorphous alloy.…”

“…Therefore, the structure of the as-quenched BMGs seems to be at least partially relaxed and these materials should display good thermal and time stability of magnetic properties. Further relaxation of manufactured alloys can be achieved by annealing process [5,6].…”

Nanocrystallization and magnetic properties of Fe85.4Zr6.8−M B6.8Cu1 (x=0 or 1; M=Nb, Nd or Mo) alloys

“…about 1000 for the Fe 85.4 Zr 5.8 Nb 1 B 6.8 Cu 1 alloy measured in the magnetizing field of the frequency of 2 kHz and amplitude of 0.16 A/m) and high intensities of disaccommodation. The isochronal disaccommodation curves with broad maxima were decomposed into three elementary processes (each of them being described by the Gaussian distribution of relaxation times) [2] and activation energies (ranging from 0.6 to 0.9 eV) of these processes were found. A distinct increase of the initial magnetic susceptibility at room temperature is observed after nanocrystallization of alloys (Fig.…”