Rare earth permanent magnets
Journal Article
·
· Elements
OSTI ID:426187
Permanent magnets were discovered centuries ago from what was known as {open_quotes}lodestone{close_quotes}, a rock containing large quantities of the iron-bearing mineral magnetite (Fe{sub 3}O{sub 4}). The compass was the first technological use for permanent magnetic materials; it was used extensively for navigational purposes by the fifteenth century. During the twentieth century, as new applications for permanent magnets were developed, interest and research in permanent magnetic materials soared. Four major types of permanent magnets have been developed since the turn of the century.
- OSTI ID:
- 426187
- Journal Information:
- Elements, Vol. 2, Issue 3; Other Information: PBD: Oct-Nov 1993
- Country of Publication:
- United States
- Language:
- English
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