The higher a magnetic disk's coercivity index, the more data it can store. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

During the heat-treatment, the heavy rare-earths diffuse into the magnet's interior along the grain boundaries, improving the coercivity—the ability of the magnet to retain its magnetization.

Researchers from the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences have ...