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首页> 外文期刊>Solid state sciences >Spin, charge and lattice dynamics of magnetization processes in frustrated Shastry-Sutherland system TmB4
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Spin, charge and lattice dynamics of magnetization processes in frustrated Shastry-Sutherland system TmB4

机译：令人沮丧的Shastry-Sutherland系统TMB4中磁化过程的旋转，充电和晶格动力学

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摘要

TmB4 - the metallic tetraboride with a geometrically frustrated Shastry-Sutherland lattice (SSL) has attracted recently a lot of attention. It exhibits a strong Ising-like anisotropy along the c-axis and a rather complex phase diagram of the ordered magnetic phase below TN approximate to 11.7 K in which besides the main magnetization (M) plateau also small fractional plateaus can be observed. To learn more about the properties of fractional plateaus we have investigated the dynamics of magnetization processes in TmB4 by M vs. H (applied magnetic field) measurements at different temperatures and different field sweep rates (swr) 1.8 K. In addition, experiments of the charge carrier mobility and magnetostriction as a function of temperature and magnetic field were carried out to specify the interplay between magnetic structure and the charge dynamics, and the role of the magneto-elastic interaction in this compound, respectively. It was shown that the magnetization values of fractional plateaus become elevated with the increase of temperature at which magnetization takes place and with the decrease of magnetic field sweep rate, which points to inconsistency with theoretical predictions based on Glauber dynamics. Moreover, it turned out that the transitions between magnetic phases during magnetization processes are accompanied by an anomalous behavior of charge mobility and distinctive variations of magnetostriction.
机译：TMB4 - 具有几何沮丧的Shastry-Sutherland格子（SSL）的金属四硼化物已经吸引了最近的注意力。它沿着C轴表现出强烈的依like各向异性，并且在TN的下方的有序磁相的相当复杂的相图近似于11.7 k，其中除了主磁化（M）平台之外，也可以观察到小的分数韧带。要了解有关分数平台的性质，我们已经研究了不同温度和不同场扫描速率（SWR）1.8 K的M与H（施加的磁场）测量的TMB4中的磁化过程的动态。另外，实验进行电荷载流动性和磁致伸缩作为温度和磁场的函数，以指示磁性结构和电荷动力学之间的相互作用，以及该化合物中的磁弹性相互作用的作用。结果表明，随着磁场扫描率的降低，磁场扫描率的温度的增加，分数平台的磁化值变得升高，这指向基于GLauber动态的理论预测不一致。此外，结果证明，磁化过程期间磁相之间的过渡伴随着电荷迁移率的异常行为和磁致伸缩的独特变化。

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