根据 175Lu NMR 数据发现的 LuB12 结构缺陷的低温结晶

IF 1.4 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2024-05-14 DOI:10.1134/s0021364024600587

O. M. Vyaselev, A. A. Gippius, N. E. Sluchanko, N. Yu. Shitsevalova

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引用次数: 0

摘要

对温度范围为 10-300 K 的十二硼化物 LuB12 的研究表明，由于 Lu 亚晶格中的缺陷导致四极频移散射，175Lu 光谱变宽。为了解释所发现的 175Lu 线宽随温度变化的滞后现象，我们提出了 "结构缺陷结晶 "的设想，即室温下无序的 Lu 亚晶格缺陷会随着温度的降低而转变为更对称、更稳定的构型，这显然是由于贾恩-泰勒效应（Jahn-Teller effect）的协同作用导致了硼框架的静态变形。

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Low-Temperature Crystallization of Structural Defects in LuB12 According to 175Lu NMR Data

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Low-Temperature Crystallization of Structural Defects in LuB12 According to 175Lu NMR Data

Studies of dodecaboride LuB₁₂ in the temperature range of 10–300 K show that the ¹⁷⁵Lu spectrum is broadened due to the scatter of quadrupole frequency shifts caused by the defects in the Lu sublattice. To explain the discovered hysteresis in the temperature dependence of the ¹⁷⁵Lu linewidth, a scenario of “crystallization of structural defects” is proposed, in which the defects of the Lu sublattice, disordered at room temperature, are transformed into a more symmetrical and stable configuration with decreasing temperature, apparently due to static distortions of the boron frame caused by the cooperative Jahn–Teller effect.

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.