서지주요정보
$LiNbO_3$와 MgO가 첨가된 $LiNbO_3$ 단결정의 전기적 및 광학적 성질 = Electrical and optical properties of $LiNbO_3$ and MgO-Doped $LiNbO_3$ single crystals
서명 / 저자 $LiNbO_3$와 MgO가 첨가된 $LiNbO_3$ 단결정의 전기적 및 광학적 성질 = Electrical and optical properties of $LiNbO_3$ and MgO-Doped $LiNbO_3$ single crystals / 김정돈.
발행사항 [대전 : 한국과학기술원, 1997].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8008179

소장위치/청구기호

학술문화관(문화관) 보존서고

DMS 97033

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

Lithium niobate($LiNbO_3$)is one of the most interesting ferroelectric materials for application in various devices, owing to its favorable electrooptic and piezoelectric properties. The congruently grown $LiNbO_3$ associated with nonstoichiometry leads to the formation of intrinsic defects in its crystal structure. So far, several defferent defect models have been proposed for nonstoichiometric $LiNbO_3$. In particular, the defect structure of the deviation in the Li/Nb and the metal/oxygen stoichiometries have a strong influence on the optical and electrical properties. We investigated the crystallographic structure, optical and dielectric properties of $LiNbO_3$ and MgO-doped $LiNbO_3$ single crystal grown by Czochralski method. The crystallographic structure of $LiNbO_3$ and MgO-doped $LiNbO_3$ was refined by four-circle X-ray diffractor method. It was found that the addition of MgO up to 4 mole% to the congruent $LiNbO_3$ leads to a steady increase of the lattice constants $a_H$ and $c_H$. But when the MgO content exceeds this concentration, an abrupt decrease in the lattice constants is observed. This abruptly change in the lattice constants seems to have an intimate connection with the anomalies in several physical properties : We observed that the SHG phase matching temperature, Curie temperature and optical damage resistance show abrupt change at this concentration. Our structure refinements suggested that this shreshold phenomena in the structure and physical properties are deeply related to the displacement Nb atoms in oxygen octahedra, which is, in turn, related to the defect structure. A change in the mechanism of the MgO incorporation at about 4 mole% in congruent $LiNbO_3$ was also confirmed.

서지기타정보

서지기타정보
청구기호 {DMS 97033
형태사항 [iv], 132 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Chong-Don Kim
지도교수의 한글표기 : 김호기
지도교수의 영문표기 : Ho-Gi Kim
수록잡지명 : "Anomalous dielectric relaxation in reduced $LiNbO_3$ single crystals". Japanese Journal of Applied Physics, vol.36, No.9
학위논문 학위논문(박사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 119-124
주제 리튬나오베이트
단결정
2차고조파
마그테시움
리튬나오베니트
결정 구조분석
$LiNbO_3$
Single crystal
SHG
Mg
$LiNbO_3$
4-circle diffractometer
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