Kim, CD Joo, GT Kim, HG 2024-01-21T18:06:58Z 2024-01-21T18:06:58Z 2021-09-04 1997-09 0021-4922 https://pubs.kist.re.kr/handle/201004/143633 Reduced black LiNbO3 single crystals were prepared by heat treatment at 1000 degrees C for 3h in H-2-N-2 atmosphere. The dependence of their dielectric properties on frequency and temperature was investigated from 1kHz to 100kHz in the temperature range 400 degrees C < T < 800 degrees C. A dielectric anomaly was found within 500 degrees C < T < 680 degrees C. The position of the maximum dielectric constant depends on heating rates in air. At a constant heating rate, intensity of dielectric constant depends on the frequency but its position does not change. The anomalous dielectric relaxation resulted from the oxygen vacancies in reduced LiNbO3. English JAPAN SOC APPLIED PHYSICS LITHIUM-NIOBATE DEFECT STRUCTURE Anomalous dielectric relaxation in reduced LiNbO3 single crystals Article 10.1143/JJAP.36.5555 1 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, v.36, no.9A, pp.5555 - 5557 JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 36 9A 5555 5557 scie scopus A1997YE80400031 2-s2.0-0031223974 Physics, Applied Physics Article LITHIUM-NIOBATE DEFECT STRUCTURE LiNbO3 single crystal ferroelectrics relaxation dielectric dispersion