서지주요정보
$(1-x)Pb(Yb_{1/2}Ta{1/2})O_3$-$xPb(Fe_{1/2}Ta_{1/2})O_3$ 고용계에서의 유전특성 및 상전이 거동 = (The) dielectric properties and phase transition of $(1-x)Pb(Yb_{1/2}Ta{1/2})O_3$-$xPb(Fe_{1/2}Ta_{1/2})O_3$
서명 / 저자 $(1-x)Pb(Yb_{1/2}Ta{1/2})O_3$-$xPb(Fe_{1/2}Ta_{1/2})O_3$ 고용계에서의 유전특성 및 상전이 거동 = (The) dielectric properties and phase transition of $(1-x)Pb(Yb_{1/2}Ta{1/2})O_3$-$xPb(Fe_{1/2}Ta_{1/2})O_3$ / 윤상철.
저자명 윤상철 ; Youn, Sang-Chul
발행사항 [대전 : 한국과학기술원, 2002].
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소장정보

등록번호

8012914

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 02023

SMS전송

도서상태

이용가능

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반납예정일

초록정보

The crystal structure and phase transition of $(1-x)Pb(Yb_{1/2}Ta_{1/2})O_3-xPb(Fe_{1/2}Ta_{1/2})O_3$ $(PYT_1-_xPFT_x)$ solid solutions for 0≤×≤0.25 have been studied by X-ray diffraction, dielectric constant, E-P hysteresis measurement and transmission electron microscopy (TEM). From the analysis of the superlattice structure of $PYT_{1-x}PFT_x$ solid solutions, it is found that the crystal structure of the $PYT_{1-x}PFT_x$ changes from the monoclinic to the pseudocubic as x increases beyond x=0.22 at room temperature. In the composition region (x<0.22), the dielectric constant vs. temperature curve exhibits a sharp normal paraelectric-antiferroelectric phase transition. For x≥0.10, the dielectric dispersion at 177℃ which is the secondary phase transition point of pure PYT disappears. For x=0.22, the dielectric constant vs. temperature curve shows significantly broad and weak frequency dependence near the transition temperature. It is considered not relaxor but normal ferroelectric transition as PFT and PFN. Also in the TEM analysis, the antiferroelectric phase still exist below the secondary phase transition temperature. This means that ferroelectric and antiferroelectric phase is co-exist at room temperature for x≤0.10. In the selected area diffraction pattern(SADP), an intermediate phase which implicately exhibits incommensurate phase behavior is observed. It is thought that its origin is the local strain change due to the ionic size difference between $Yb^{3+}$ and $Fe^{3+}$.

서지기타정보

서지기타정보
청구기호 {MMS 02023
형태사항 vii, 75 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sang-Chul Youn
지도교수의 한글표기 : 주웅길
지도교수의 영문표기 : Woong-Kil Choo
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 74-75
주제 Pb(Yb1/2Ta1/2)O3
Pb(Fe1/2Ta1/2)O3
강유전체
유전 특성
상전이
Pb(Yb1/2Ta1/2)O3
Pb(Fe1/2Ta1/2)O3
ferroelectricity
dielectric property
phase transition
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