서지주요정보
반강유전성 액정(CS-4001)에서의 전기장유도 상전이 특성 및 스위칭 특성연구 = Field-induced phase transition and switching dynamics in antiferroelectric liquid crystal (CS-4001)
서명 / 저자 반강유전성 액정(CS-4001)에서의 전기장유도 상전이 특성 및 스위칭 특성연구 = Field-induced phase transition and switching dynamics in antiferroelectric liquid crystal (CS-4001) / 정미혜.
저자명 정미혜 ; Jung, Mee-Hye
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014797

소장위치/청구기호

학술문화관(문화관) 보존서고

DPH 03028

SMS전송

도서상태

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초록정보

The phase transition in an antiferroelectric liquid crystal(CS-4001) was studied by polarization reversal current, I-E hysteresis loops and dielectric measurements. Dielectric measurements as a function of d. c. bias field and a. c. probe frequency were made in $SmC^*_A$ phase of CS-4001 compound to study the field induced transition from antiferroelectric to the ferroelectric phase. Two dielectric relaxation peaks observed in the concerned region of the field induced transition were analyzed to the formula of modified Debye relaxator and the Landau free energy functional theory of Orihara and Ishibashi to derive the dielectric relaxation frequencies and the threshold electric fields associated with the transition. Polarization reversal current was studied at various driving frequencies from 1Hz to 100 Hz for a 1.6μm thin sample of CS-4001 at 40℃. Two peaks during half period were observed and one of them disappeared with increasing the driving frequency. Polarization reversal current also measured to obtain the field induced polarization as a function of the field strength. All of these measurements confirm that the field induced phase transition undergoes from the antiferroelectric to the ferroelectric phase.

서지기타정보

서지기타정보
청구기호 {DPH 03028
형태사항 [iv], 84 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Mee-Hye Jung
지도교수의 한글표기 : 김종진
지도교수의 영문표기 : Jong-Jean Kim
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 77-81
주제 반강유전성액정
스위칭
유전율
상전이
Antiferroelectric liquid crystal
switching
dielectric susceptibility
phase transition
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