서지주요정보
KDP 불순물이 상전이 근방에서 반강유전성 ADP 결정에 미치는 효과 = KDP impurity effects in the anti-ferroelectric ADP crystals near phase transition
서명 / 저자 KDP 불순물이 상전이 근방에서 반강유전성 ADP 결정에 미치는 효과 = KDP impurity effects in the anti-ferroelectric ADP crystals near phase transition / 김규태.
저자명 김규태 ; Kim, Kyu-Tae
발행사항 [서울 : 한국과학기술원, 1985].
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소장정보

등록번호

4103343

소장위치/청구기호

학술문화관(문화관) 보존서고

MAP 8505

SMS전송

도서상태

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반납예정일

초록정보

Temperature dependence of dielectric constant of $K_x(NH_4)_{1-x}H_2PO_4$ System for x=0%, 2.7%, 5.2%, 7.1% respectively was measured to study on the KDP impurity effects in the anti-ferroelectric phase transition of ADP. Qualitative change of ADP phase transition by impurity effects was not observed, but increase of Curie-Weiss constant and decrease of transition temperature with increasing $K^+$ ion concentration could be observed. These results suggest that $K^+$ ion acts so as to weaken the N-H--O bond and acts as competing centers of ferroelectric interaction against antiferroelectric interaction. Decrease of transition temperature was compared with the theory of Prelovsek and Blinc quantitatively and discussed briefly. And a small qualitative change in dielectric constant anomaly could be observed when poling ADP along a-axis with 6kV/cm DC electric field, which suggests a new transition to some(ferroelectric?) phase other than the anti-ferroelectric phase may be possible.

서지기타정보

서지기타정보
청구기호 {MAP 8505
형태사항 iv, 49 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Kyu-Tae Kim
지도교수의 한글표기 : 김종진
지도교수의 영문표기 : Jong-Jean Kim
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 47-49
주제 Contamination (Technology)
Phase transformations (Statistical physics)
강유전체. --과학기술용어시소러스
불순물 (잡물) --과학기술용어시소러스
상전이. --과학기술용어시소러스
Ferroelectric crystals.
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