| 摘要 |
PURPOSE:To maintain and show excellent magnetostrictive properties in a wide temp. range in the supermagnetostrictive alloy by specifying the atomic ratio of rare earths, Co and Fe in the alloy. CONSTITUTION:A rare earth-Co series supermagnetostrictive alloy is formed of a formula R(Co1-xFex)z expressed by atomic ratio. In the formula, 0.001<=x<=0.8 and 0.2<=z<=15 are satisfied as well as R denotes one or more kinds selected from the group of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. Furthermore, its axis of easy magnetization is essentially consisting of cubic crystals in the direction of <100> or <110> in the main. The supermagnetostrictive alloy has an excellent degree of sintering, stability and reliability as well as excellent magnetostrictive properties and is suitable for wide application not only to actuators for precision working but also to motors, speakers, dampers, sonars, etc. |
