The Author traces the history of soft, magnetic materials from 1000 B.C. to the present time. He describes the work of Oersted and Faraday who invented the first transformer, and the gradual improvements in core material over the last 150 years. These cover soft iron, silicon iron, grain orientation, Hi-B steels and domain control by lasers and spark ablation. Amorphous metallic glasses are also detailed. Having spent a lifetime on nickel iron alloys, particularly Mumetal, he discusses design and characteristics of a wide range of audio transformers and magnetic shields.
(See document for exact affiliation information.)
https://aes2.org/publications/elibrary-page/?id=4962
(2554KB)
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member Join the AES. If you need to check your member status, login to the Member Portal.
