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Date of Publication:2011-01-01

Journal:功能材料

Affiliation of Author(s):机械工程学院

Volume:42

Issue:9

Page Number:1601-1605

ISSN No.:1001-9731

Abstract:High driving frequency of magnetic field is one of the key factors which
   restrict the popularization and application of giant magnetostrictive
   thin film device.The research on how to reduce the magnetic field
   driving frequency of giant magnetostrictive thin film device has
   important significance to the popularization and application of this
   kind of device.Based on the deep analysis of fundamental reason which
   cause giant magnetostrictive thin film existing anisotropy,combining the
   motion mechanism of domains in the magnetostrictive process of thin
   film,the paper puts forward a new idea that as long as it is able to
   overcome the demagnetizing field existing in giant magnetostrictive thin
   film,better dynamic characteristics can be obtained in the direction of
   hard magnetization axis under low driving frequency of magnetic field.An
   experiment is carried out in the hard magnetization axis experimental
   system of giant magnetostrictive thin film.The results show that it is
   able to make the thin film generate superharmonic resonance with
   excellent response through applying a suitable bias magnetic field to
   overcome demagnetizing field.The experimental results provide a new way
   for reducing the diving frequency of giant magnetostrictive thin film
   device.

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