A KIND OF PERMANENT MAGNETIC MATERIAL WITH LOW REVERSIBLE TEMPERATURE COEFFICIENT

For special microwave devices and precision instruments, the flux density of the permanent magnets has to be a constant over a wide temperature range. It means that a kind of permanent magnetic material with low reversible temperature coefficient is needed. Thus, the permanent magnetic material containing Gd and Er is fabricated. The material is prepared by liquid phase-sintering technique. The effects of composition, ball milling time, sintering temperature and heat treatment on the magnetic properties of the materialarestudied.