Effect of magnetic field on the piezoelectric resonant frequency of a piezoelectric-ferrite composite

K. Srinivas; Guduru Prasad; T. Bhimasankaram; S. V. Suryanarayana; Chandra Prakash Rana; S. N. Chatterjee

doi:10.1117/12.369466

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9 November 1999 Effect of magnetic field on the piezoelectric resonant frequency of a piezoelectric-ferrite composite

K. Srinivas; Guduru Prasad; T. Bhimasankaram; S. V. Suryanarayana; Chandra Prakash Rana; S. N. Chatterjee

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Proceedings Volume 3903, Indo-Russian Workshop on Micromechanical Systems; (1999) https://doi.org/10.1117/12.369466
Event: Indo-Russian Workshop on Micromechanical Systems, 1999, New Delhi, India

Abstract

In this paper, we report the observation of the effect of magnetic field on the shift of resonant frequencies of a composite consisting of 40 percent PZT and 60 percent Ni_0.98Co_0.02Fe₂O₄. The samples were synthesized by sintering a compressed mixture of Ni_0.98Co_0.02Fe₂O₄ and the PZT at 1200 degrees C. The samples were electrically poled at 7.5 kV/cm for 30 mts at 100 degrees C and were cooled to room temperature in the presence of filed. The resonant frequencies were determined by analyzing the admittance plots. The electromechanical coupling coefficients were evaluated by the resonance- antiresonance method. The results show that there is a considerable shift in resonant frequency under the action of magnetic field. The relative shift in the resonant frequency in crease with increasing field, reaching a maximum around 1.5 kOe.

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K. Srinivas, Guduru Prasad, T. Bhimasankaram, S. V. Suryanarayana, Chandra Prakash Rana, and S. N. Chatterjee "Effect of magnetic field on the piezoelectric resonant frequency of a piezoelectric-ferrite composite", Proc. SPIE 3903, Indo-Russian Workshop on Micromechanical Systems, (9 November 1999); https://doi.org/10.1117/12.369466

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