Positive large linear magnetostriction in Fe-Pd crystalline alloys

Conventional magnetostriction materials have some practical disadvantages. In order to develop a new magnetostriction alloy having no such disadvantages, the Fe-Pd alloy system has been investigated. The value of longitudinal linear magnetostriction λ depends sensitively on the heat-treatment conditions. In the cooled state from 900 °C, the concentration dependence of λ at room temperature takes a pronounced maximum at 33% Pd, indicating about 85×10−6 at 500 Oe. Cold working such as swaging has been easily performed.