Anomalies of dielectric properties and conductivity in single domain LiNbO3:Zn crystals. Issue 173 (23rd July 2016)

• Record Type: Journal Article
• Authors: Palatnikov, M. N.; Sandler, V. A.; Makarova, O. V.; Sidorov, N. V.; Manukovskaya, D. V.; Efremov, I. N.; Biryukova, I. V.; Bormanis, K.
• Is Part Of: Integrated ferroelectrics. Issue 173(2016)
• Page Start: 119
• Page End: 127
• Publication Date: 2016-07-23
• Subjects: Lithium niobate -- single crystals -- dielectric constant -- conductivity -- piezo-modulus; Ferroelectric devices -- Periodicals; Integrated circuits -- Periodicals; 537.244805
• DOI: 10.1080/10584587.2016.1186431
• Languages: English
• ISSNs: 1058-4587

Abstract

ABSTRACT: A study of the temperature dependence of dielectric constant, conductivity, and piezoelectric modulus in the single-domain state of LiNbO3 crystals modified by Zn admixture at threshold concentration is reported. Unipolarity of the LiNbO3 :Zn crystals is observed to increase after treatment of brand-new samples by high-temperature electro-diffusion annealing and by subsequent high-temperature annealing of short-circuited samples. The observed effects are explained as a result of meta-stable residual domains collapsing at high temperature the collapse being assisted by disintegration of charged clusters stabilizing domain walls. The rise of unipolarity is accompanied by anomalies on the σ(T) and ϵ(T) dependences and by a significant increase of the value of the piezo-modulus.