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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 55-57Dielectric Tunability in...

Dielectric Tunability in Ferromagnetic-Ferroelectric Composite System

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Abstract:

A new kind of lead-free ferromagnetic-ferroelectric (FM/FE) composite was successfully prepared by incorporating the dispersed 0.15Ni_0.98Co_0.02Fe₂O₄(NCF) ferromagnetic nanoparticles into 0.85(K_0.5Na_0.5)NbO₃-LiSbO₃ (KNN-LS) ferroelectric micromatrix. The relative dielectric constant (ε_r) of the ceramic as a function of frequency (0.1 -200 kHz) under different dc bias electric field strengths was investigated in detail. ε_r increases with increasing dc bias electric field, while tanδ decreases with the increase in frequency. At room temperature, the high dielectric tunability (K_D=11.41%) and high figure of merit (FOM=15.66) under the low dc electric field of 3 kV/cm, clearly imply that these ceramics are promising materials for tunable microwave device applications.

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Periodical:

Applied Mechanics and Materials (Volumes 55-57)

Pages:

428-432

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.55-57.428

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Online since:

May 2011

Authors:

Yun Zhou, You Xiang Ye, Liang Neng Wu, Sen Jiang Yu

Keywords:

Dielectric Tunability, Electric Field, Multiferroic

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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