Rare earth magnets like Samarium-Cobalt Magnets (SmCo) have the highest energy density per volume and weight and also the best demagnetizations resistance. Very small magnets can be produced. Samarium-Cobalt Magnets (SmCo) are produced by sintering and can only be processed by grinding, due to the strength and brittle of the material. The temperature range goes up to + 250 °C. Disadvantages are the high raw material prices and the limited availability of special alloys.
