레드 저마네이트 단결정의 초전성 및 자발분극 변화

Abstract

실온에서 부터 Curie 온도까지 레드 저마네이트(Pb??Ge₃O??) 단결정의 초전계수를 이론식으로 부터 구한 값과 실험값을 비교하였다.

실온에서 레드 저마네이트 단결정의 초전계수 값은 2.5×10??C/m²℃이었고, 자발분극은 4.6μC/㎠이었다.

레드 저마네이트 단결정의 온도변화에 따른 초전계수는 Gibbs 자유에너지 이론과 이력곡선으로 부터 계산된 이론값과 실험값이 잘 일치하였다.

The pyroelectirc coefficients of Pb??Ge₃O?? single crystals were obtained from room temperature to Curie temperature. At room temperature, the pyroelectirc coefficient and spontaneous polarization of Pb??Ge₃O?? single crystals were 2.5×10?? C/m²℃ and 4.6μC/㎠, respectively.

The temperature dependency of the pyroelectric coefficient of Pb??Ge₃O?? single crystal was in good agreement with the results calculated from hysteresis loop and the Gibbs free energy theory.

The pyroelectirc coefficients of Pb??Ge₃O?? single crystals were obtained from room temperature to Curie temperature. At room temperature, the pyroelectirc coefficient and spontaneous polarization of Pb??Ge₃O?? single crystals were 2.5×10?? C/m²℃ and 4.6μC/㎠, respectively.

The temperature dependency of the pyroelectric coefficient of Pb??Ge₃O?? single crystal was in good agreement with the results calculated from hysteresis loop and the Gibbs free energy theory.