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Statistical Mechanics Treatment of the Broadened Snoek Relaxation Peak in Ternary Niobium–Vanadium–Oxygen Alloys

机译:三元铌钒钒氧合金中Snoek弛豫峰变宽的统计力学处理

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摘要

The Snoek relaxation profiles for ternary Niobium–Vanadium–Oxygen systems were analyzed by an embedded-cell model of statistical mechanics treatment. The relaxation characteristic and broadening mechanism were systematically discussed and some conflicting interpretations in the early research were clarified. The complicated Snoek spectrums of the Nb–V–O system can be resolved into a series of effective elementary Debye peaks, which result from the transitions of interstitial oxygen atoms between adjacent octahedral sites. The relaxation parameters of each elementary peak can be determined by element species and atomic arrangements within the corresponding embedded octahedron. The Snoek relaxation characteristic in Nb–V–O systems mainly depends on the sites distributions and the transitions status of the interstitial oxygen atoms, which are controlled by the site-dependence energies and the transition probabilities, respectively.
机译:通过统计力学处理的嵌入式单元模型分析了三元铌钒氧体系的Snoek弛豫曲线。系统地讨论了弛豫特性和扩展机制,并阐明了早期研究中的一些矛盾解释。 Nb–V–O系统的复杂Snoek光谱可以解析为一系列有效的基本Debye峰,这是由相邻八面体位点之间的间隙氧原子跃迁引起的。每个基本峰的弛豫参数可以通过相应的嵌入八面体中的元素种类和原子排列来确定。 Nb–V–O系统中的Snoek弛豫特性主要取决于间隙氧原子的位点分布和跃迁状态,它们分别受位点依赖能和跃迁几率控制。

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