Title :
Magnetic aftereffects in Si-doped YIG
Author :
Torres, Carlos ; Alejos, Oscar ; Hernández-Gómez, Pablo ; Muñoz, José María ; De Francisco, Carlos
Author_Institution :
Dept. de Electr. y Electron., Valladolid Univ., Spain
fDate :
9/1/2002 12:00:00 AM
Abstract :
Magnetic aftereffect processes in yttrium iron garnet with silicon substitutions are analyzed by means of magnetic disaccommodation techniques. We have recorded the time evolution of the initial magnetic permeability after sample demagnetization for polycrystalline specimens with nominal composition Y3Fe5-xSixO12 (0≤x≤1) in the temperature range from 80 K to 500 K. We have found that silicon substitutions give rise to new relaxation and frequency dependent accommodation processes at high and low temperatures, respectively. The origins of both types of processes are finally discussed.
Keywords :
demagnetisation; garnets; magnetic aftereffect; magnetic domain walls; magnetic permeability; silicon; yttrium compounds; 80 to 500 K; Y3Fe5-xSixO12; YFe5O12:Si; YFe5O12Si5O12; YIG:Si; YIGSi5O12; demagnetization; domain wall motion; frequency dependent accommodation processes; initial magnetic permeability time evolution; magnetic aftereffects; magnetic disaccommodation techniques; polycrystalline specimens; relaxation processes; Demagnetization; Frequency dependence; Garnets; Iron; Magnetic analysis; Permeability; Silicon; Temperature dependence; Temperature distribution; Yttrium;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.802137
