Magnetization of Micron Sized Magnetite Particles

Abstract

Approximately equidimensional particles of magnetite of about 1 JlIll in length contain domain patterns which are severely restricted by the small particle size. Measurements have been made of the thermoremanent and hysteretic properties of samples containing small magnetite grains, which had been separated to avoid strong interparticle interactions. The experimental results are compared with predictions based on current theoretical models.