FINE-PARTICLE MAGNETIC OXIDES

The response of fine-particle magnetic oxides to applied magnetic fiel ds is of primary importance in several areas of applied physics, such as magnetic separation, magnetic fluid devices, and magnetic recording . It is also of fundamental interest. In this article contemporary res earch on the important properties of magnetic oxide particles is revie wed, including both applied and basic work. The microscopic and macros copic properties of ferrimagnetic and antiferromagnetic fine-particle systems are considered. Special attention is paid to the physics of ma gnetization reversal mechanisms, surface effects, and the intrinsic pr operties of fine-particle magnetic oxides.