用铽改性 SBN晶体能有效地改善晶体的性质.实验测量了铽改性 Sr0.61Ba0.39Nb2O6晶体的电容率和热电系数.实部ε′r1和虚部ε′′r1分别在 100K和 55K附近有峰.电容率的温度系数 TCε r3 和 TCε r1在 55K附近都峰化.在 90K以下,检测出[100]方向存在热电性.这些实验结果证明,该晶体存在低温铁电-铁电相变 .
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