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Ferroelectric-relaxor behavior of Ba(Ti0.7Zr0.3)O3 ceramics

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4 Author(s)
Yu, Zhi ; Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802 ; Ang, Chen ; Guo, Ruyan ; Bhalla, A.S.

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Ferroelectric-relaxor behavior of Ba(Ti0.7Zr0.3)O3 ceramics is studied in the temperature range from 150 to 450 K. A broad dielectric peak with a high-dielectric maximum exhibits frequency dispersion. The dielectric relaxation rate follows the Vogel–Fulcher relation with E=0.21 eV and TVF=199.6 K. The polarization hysteresis loops were observed with a remnant polarization of 10 μC/cm2 at 175 K. The high-dielectric constant and high-polarization properties are expected to find practical applications at low temperatures. © 2002 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:92 ,  Issue: 5 )