The Effect of Angular Variations in Field on Fine-Particle Remanence
The Stoner-Wohlfarth model is used to calculate the remanence of a randomly-oriented assembly of single-domain particles when the applied field changes in direction. The cases considered are (1) fields applied successively in directions differing by multiples of 1/2π and (2) fields rotated through multiples of 1/2π. Some consideration is also given to the anhysteretic remanence when the unidirectional and alternating fields are orthogonal. Experimental results obtained on disks of γFe2O3 recording tape are found to be in reasonably good qualitative agreement with the calculations.
KeywordsGood Qualitative Agreement Field Rotation Constant Strength Manent Magnet Critical Field Strength
- 1.E. P. Wohlfarth, Research 8, S42 (1955).Google Scholar