Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/32275
Title: Relaxor behavior of (Ba,Sr)(Zr,Ti)O3 ferroelectric ceramics
Authors: Tang, XG
Wang, XX
Chew, KH
Chan, HLW 
Keywords: BSZT ceramic
Electric field
Relaxor behavior
Tunability
Issue Date: 2005
Publisher: Pergamon Press
Source: Solid state communications, 2005, v. 136, no. 2, p. 89-93 How to cite?
Journal: Solid state communications 
Abstract: We examine the ferroelectric-relaxor behavior of (Ba0.65Sr 0.35)(Zr0.35Ti0.65)O3 (BSZT) ceramics in the temperature range from 80 to 380 K. A broad dielectric maximum, which shifts to higher temperature with increasing frequency, signifies the relaxor-type behavior of these ceramics. The value of the relaxation parameter γ∼2 estimated from the linear fit of the modified Curie-Weiss law, indicates the relaxor nature of the BSZT ceramics. The dielectric relaxation rate follows the Vogel-Fulcher relation with TVF=107 K, E a=0.121 eV, and ν0=6.83×1014 Hz, further supports such relaxor nature. The slim P-E hysteresis loop and 'butterfly' shape dc bias field dependence of permittivity at T>Tm (Tm, the temperature of permittivity maximum) clearly signifies the occurrence of nanopolar clusters, which is the typical characteristic of ferroelectric relaxor. At 300 K and 10 kHz, the dielectric constant and loss tan δ are ∼1100 and 0.0015, respectively. The high tunability (∼25%) and figure of merit (∼130) at room temperature show that the BSZT ceramics could be a promising candidate for tunable capacitor applications.
URI: http://hdl.handle.net/10397/32275
ISSN: 0038-1098
EISSN: 1879-2766
DOI: 10.1016/j.ssc.2005.06.034
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