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Point Defects of Bismuth in TlInTe2 Crystals: Electrophysical and Dielectric Properties of Solid Solutions
Physics of the Solid State ( IF 0.9 ) Pub Date : 2022-09-09 , DOI: 10.1134/s1063783422060063
A. I. Nadzhafov , R. S. Madatov , K. G. Khalilova , G. M. Iskenderova

Abstract

The TlInTe2–Bi phase diagram was studied in the concentration region of 0–10 at % of Bi by complex methods of physicochemical analysis, and the bismuth solubility in TlInTe2 at room temperature was established to be 5 at %. The electrophysical and dielectric properties of (TlInTe2)1 – xBix solid solutions were studied. Using the (TlInTe2)1 – xBix composition, where x = 0.05, as an example, bismuth impurities were shown to increase the conductivity in direction (001), change the hole conductivity of a TlInTe2 crystal for electron type, and strongly increase the electric anisotropy of a TlInTe2 crystal ρ|| by more than 103 times. The effect of bismuth impurities on the dielectric properties of TlInTe2 crystals was also observed. Bismuth impurities formed barriers on the migration way of thallium ions and increased the temperature Ti of phase transition into the ion-conducting phase by 69 K in crystallographic direction [001] and 87 K in direction [110].



中文翻译:

TlInTe2 晶体中铋的点缺陷:固溶体的电物理和介电性能

摘要

TlInTe 2 -Bi 相图在Bi 的0-10 at % 浓度范围内通过复杂的物理化学分析方法进行了研究,确定室温下铋在TlInTe 2中的溶解度为5 at %。研究了(TlInTe 2 ) 1 –  x Bi x固溶体的电物理和介电性能。使用 (TlInTe 2 ) 1 –  x Bi x组成,其中x = 0.05,作为示例,铋杂质显示增加方向 (001) 的电导率,改变 TlInTe 2的空穴电导率晶体为电子型,强烈增加 TlInTe 2晶体的电各向异性 ρ || 10 3倍以上。还观察到铋杂质对TlInTe 2晶体的介电​​性能的影响。铋杂质在铊离子的迁移路径上形成屏障,并使相变温度 Ti 在结晶方向 [001] 上增加了 69 K,在方向上增加了 87 K [110]。

更新日期:2022-09-09
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