It is shown that K ( Ta, Nb) O_3 crystal exists in cubic phase when the content of Ta is higher than a certain value at room temperature and no phase transition occurs from growth temperature to room temperature.

  • 发现含钽量大于一定量后,K(Ta,Nb)O3晶体在室温下以立方相存在,在生长温度至室温间无相变。通常说的一维Ising模型无相变是有条件的。

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