Antipolarity domain nucleation and growth during heat treatment of proton‐exchanged LiTaO3
Antipolarity domain nucleation and growth during heat treatment of proton‐exchanged LiTaO3
复制标题
质子交换 LiTaO3 热处理过程中反极性域的成核和生长
DOI：
10.1063/1.354082
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
A. Tourlog
中科院分区：
文献类型：
--
作者：
K. Nakamura;M. Hosoya;A. Tourlog
在LiTaO3晶体中，通过质子交换，然后在低于居里点的温度下进行热处理，从而在−c表面产生反型层，从而发生铁电局部畴反转。本文报道了钽酸锂片中的畴反转现象，并进行了实验以阐明其机理。居里温度附近的介电常数和电导率的测量表明，在冷却期间引起的热释电场不太可能是畴反转的主要原因。热处理过程中的压电响应的测量，这表明反极性域形核在热处理的初始阶段，并逐渐增长，这一实验结果得到加强。
Ferroelectric local domain inversion occurs in LiTaO3 crystals by proton exchange followed by heat treatment at temperatures just below the Curie point, thereby yielding an inversion layer at the −c surface. This article reports the domain inversion phenomenon in LiTaO3 plates and the experiments performed to clarify the mechanism. Measurements of dielectric constant and electrical conductivity near the Curie temperature suggest that the pyroelectric fields induced during the cooling down period are not likely to be the main cause of the domain inversion. This experimental result is reinforced by measurements of the piezoelectric response during heat treatment, which shows that the antipolarity domain nucleates at the initial stage of heat treatment and grows gradually.