Since ferrite magnetostrictive materials have been developed, its advantage is expanding widely in their actual application fields instead of former Nickelalloys.
Followings are introduction of characteristics, featurs and applications for Ni-Cu-Co ferrite which is most widely utilizing among current ferrite magnetostrictive materials.

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Iron-rich amorphous ribbons have excellent magnetostrictive properties such as ultrasonic propagation phenomena with small attenuation in which propagation velocity is widely controllable due to the ΔE effect, and high sensitivity of magnetic properties against external stresses (inverse magnetostrictive effects). Amorphous magnetostrictive alloys also have outstanding elasticity and various kinds of linear characteristics which are suitable for applications to sensors or transducers in the field of so-called “Mechatronics”.
Basic characteristics of amorphous magnetostrictive ribbons are summarized and their applications to variable delay lines and to force and displacement transducers are represented.

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The magnetic transducers utilizing the magnetostriction effect produces a larger output voltage and a greater overload capacity than the strain gage type transducers. For this reason, magnetostriction type transducers has so far been used widely in many fields, for instance, loadcell, tention meter, torque meter etc. In this paper, recent applications of them and their problems for practical use are described.

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