Long Xifa, Ye Zuo-Guang
Fujian Institute of Research on the Structure ofMatter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 China.
IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Dec;54(12):2595-8. doi: 10.1109/TUFFC.2007.584.
Relaxor behavior has been found in a new solid solution between complex perovskite Ba(Zn(1/3)Nb(2/3))O(3) (BZN) and ferroelectric PbTiO(3) (PT), prepared by solid state reactions. A strong dispersion of the maximum of dielectric permittivity (epsilon(')) appears around the temperature of T(m), which shifts toward higher temperatures with increasing frequency. The variation of T(m) with frequency follows the Vogel-Fulcher relationship. The variation of 1/epsilon(') with temperature above Tm deviates from the Curie-Weiss law, but satisfies a Lorentz-type function. The relaxor behavior becomes weaker upon increasing PT-content.
在通过固态反应制备的复杂钙钛矿Ba(Zn(1/3)Nb(2/3))O(3)（BZN）和铁电体PbTiO(3)（PT）之间的一种新型固溶体中发现了弛豫行为。介电常数最大值（ε'）在T(m)温度附近出现强烈色散，且随着频率增加向更高温度移动。T(m)随频率的变化遵循Vogel-Fulcher关系。高于Tm时1/ε'随温度的变化偏离居里-外斯定律，但满足洛伦兹型函数。随着PT含量增加，弛豫行为变弱。
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