Co2+-Al3+ 层状双氢氧化物的簇状自旋玻璃行为

IF 2.8 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemical Physics Letters Pub Date : 2024-11-09 DOI:10.1016/j.cplett.2024.141745

E.L. Fertman , A.V. Fedorchenko , E. Čižmár , Yu.G. Pashkevich , M. Holub , V. Tkáč , R. Tarasenko , A. Feher , C.S. Neves , D.E.L. Vieira , A.N. Salak

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引用次数: 0

摘要

通过分析随温度变化的交流磁感应强度发现，这些层状双氢氧化物表现出磁簇自旋玻璃的特性，而与它们的基底间距值和钴/铝比率无关，这一点可以通过使用 Vogel-Fulcher 定律得到的 EA/kBT0 > 1 关系得到证明。得到的迈多什参数值范围在 0.017-0.052 之间，这表明其中一些材料与典型的自旋玻璃相差不远，这意味着磁簇的尺寸相当小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Cluster spin glass behaviour of Co2+−Al3+ layered double hydroxides

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Cluster spin glass behaviour of Co2+−Al3+ layered double hydroxides

Frequency-dependent magnetic behaviour of cobalt-aluminium layered double hydroxides (LDH) with the Co/Al ratio of 2 and 3, was studied between 2 and 300 K. It was found from analysis of the temperature-dependent ac magnetic susceptibility that these LDH exhibit a magnetic cluster spin glass behaviour regardless of their basal spacing value and the Co/Al ratio as evidenced by E_A/k_BT₀ > 1 relation obtained using Vogel-Fulcher law. The obtained values of Mydosh parameters in the range of 0.017–0.052 suggest that some of these materials are not far from the canonical spin glasses, implying a rather small size of the magnetic clusters.

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来源期刊

Chemical Physics Letters 化学-物理：原子、分子和化学物理

CiteScore

5.70

自引率

3.60%

发文量

798

审稿时长

33 days

期刊介绍： Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage. Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.