Applications of amorphous magnetic alloys in electronic devices

Abstract

Some of the features of amorphous magnetic alloys that differentiate them from other soft magnetic materials include: low magnetic loss, fast flux reversal, high electrical resistivity and low acoustic loss. Furthermore, a wide range of B– H characteristics can be obtained through alloy design and heat-treatment of the alloys under different conditions. The versatile properties thus obtained can then be utilized in a number of magnetic applications ranging from large electrical power devices such as transformers and motors to recording heads and to anti-pilferage markers. This paper reviews the applications of various amorphous magnetic alloys in electronic devices including magnetic components in power electronics, telecommunication equipment, automotive parts and sensing devices. Relationships between property requirements and material capabilities are also discussed.