Influence of intermolecular interactions on magnetic observables

Influence of intermolecular interactions on magnetic observables
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分子间相互作用对磁可观测量的影响

DOI:
10.1103/physrevb.93.054421
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发表时间:
2016
期刊:
影响因子:
3.7
通讯作者:
Jürgen Schnack
Jürgen Schnack
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jürgen Schnack

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通常,晶体中的磁性分子相互作用非常弱,以至于直流磁性观测值的测量反映了单个分子的系综性质,这是分子磁学的隐含范例。但是,分子几乎不相互作用的假设不成立的案例数量在稳步增长。与非相互作用情况的偏差在具有反铁磁耦合的团簇中可以特别清楚地看到,其中低温磁化曲线的步骤随着分子间相互作用的增加而被抹去。在本研究中,我们用一维、二维和三维空间的例子展示了分子间相互作用如何影响典型的磁性观测值,如磁化率、磁化率和比热。
Very often it is an implied paradigm of molecular magnetism that magnetic molecules in a crystal interact so weakly that measurements of dc magnetic observables reflect ensemble properties of single molecules. But the number of cases where the assumption of virtually noninteracting molecules does not hold grows steadily. A deviation from the noninteracting case can especially clearly be seen in clusters with antiferromagnetic couplings, where steps of the low-temperature magnetization curve are smeared out with increasing intermolecular interaction. In this investigation we demonstrate with examples in one, two, and three space dimensions how intermolecular interactions influence typical magnetic observables such as magnetization, susceptibility, and specific heat.
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