Growth and electrical properties of Mg:α-LiIO₃ crystal

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• 作者：YinXiao Du ; Yuping Sun ; W.C. Chen ; X.L. Chen and D.F. Zhang
• 关键词：A1. Crystal growth ; A1. Dielectric constant ; A1. Doping ; A1. Electrical conductivity ; A1. Electrical properties ; A1. Full-width at half-maximum ; A1. Segregation coefficient ; B1. Magnesium
• 刊名：Journal of Crystal Growth
• 出版年：2006
• 出版时间：1 June 2006
• 年：2006
• 卷：291
• 期：2
• 页码：424-427
• 全文大小：255 K

文摘

The 20–70 ppm Mg²⁺-doped alpha-lithium iodate (Mg:α-LiIO₃) crystals were successfully grown by aqueous solution method. Transparent and well-crystallized hexagonal prisms were obtained by evaporation with controlled condensation of water solutions at a constant temperature of 60 °C. An intriguing finding is that the segregation coefficient of Mg²⁺ ions in the Mg(70 ppm):α-LiIO₃ crystal is up to 2.5, suggesting the Mg²⁺ ions are easily incorporated into crystal lattice during the crystal growth process. The physical properties of electrical conductivity, dielectric and piezoelectric characterization are investigated on the Mg(70 ppm):α-LiIO₃ crystals. In comparison with the pure α-LiIO₃ crystal, the electrical conductivity and the dielectric characterization of the Mg(70 ppm):α-LiIO₃ crystal are enhanced significantly, but its piezoelectric coefficient d₃₃ decreases from 47 to 5.5 pC/N.