Magnetism and Magnetic Materials

Hard and Soft Magnetic Materials

Permanent materials are also called hard materials. Permanent magnets utilize rare earth magnetic materials in signaling devices and computers. Signaling devices have forces up to ten times of that ordinary magnet and they have high durability. Magneto-optic magnets are used for memory system in computers, are spot-size magnets which are made with thin wafers. Hard magnets are used in data storage analog and digital also. Soft magnetic materials are easily magnetized and demagnetized magnetic materials. The applications of soft magnetic materials were divide into two main categories- AC and DC. In DC applications the material executes an operation when magnetized and then demagnetized at the end of the operation. In AC applications the material will be endlessly cycled from being magnetized in unique direction to the other, through the period of operation. Soft magnets are used in signal transferring.