Role of the d-d interaction in the antiferromagnetic phase of λ-(BEDT-STF)2FeCl4
Role of the d-d interaction in the antiferromagnetic phase of λ-(BEDT-STF)2FeCl4
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d-d 相互作用在 λ-(BEDT-STF)2FeCl4 反铁磁相中的作用
DOI：
10.1103/physrevb.97.104404
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发表时间：
2018
影响因子：
3.7
通讯作者：
Nomura Kazushige
中科院分区：
文献类型：
--
作者：
Minamidate Takaaki;Shindo Hironori;Ihara Yoshihiko;Kawamoto Atsushi;Matsunaga Noriaki;Nomura Kazushige
在常压下对准二维相互作用系统进行了磁化率和质子核磁共振测量。由负离子自旋引起的磁化率在低温下表现出各向异性，其对平行于轴的外场的温度依赖性在8K处表现为宽峰结构。与反铁磁（AF）转变相关的温度依赖性中的一个尖锐的峰被观察到在K，连同下面的NMR谱的剧烈分裂。静态磁化率与NMR位移分裂的关系表明存在较强的AF相互作用。这些结果可以用在AF长程有序自旋系统中考虑AF耦合自旋系统的模型来解释。我们发现，AF相在型盐可以普遍解释这个模型。
Magnetic susceptibility and proton nuclear magnetic resonancemeasurements were performed for the quasi-two-dimensionalinteracting systemat ambient pressure. Magnetic susceptibility arising from thespins of theanion show an anisotropy at low temperature and its temperature dependence for the external field parallel to theaxis is described as a broad peak structure at 8 K. A sharp peak in the temperature dependence ofassociated with the antiferromagnetic (AF) transition is observed atK, together with the drastic splitting of the NMR spectrum below. The relation between the static susceptibility and the splitting of the NMR shift suggests the existence of the relatively strongAF interaction. These results can be explained by the model considering the AF-coupled-spin system in the AF long-range-ordered-spin system. We find that the AF phases in-type salts can be universally explained by this model.