Magnetic Excitations in the spin-5/2 Antiferromagnetic Trimer Substance SrMn_3P_4O_<14>
Magnetic Excitations in the spin-5/2 Antiferromagnetic Trimer Substance SrMn_3P_4O_<14>
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自旋5/2反铁磁三聚体物质SrMn_3P_4O_<14>中的磁激发
DOI：
10.1103/physrevb.84.214402
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
et al
中科院分区：
文献类型：
--
作者：
M.Hase;M.Matsuda;K.Kaneko;et al
在大自旋(5/2)的物质SrMnPO中，出现了1/3的量子力学磁化平台和磁性长程有序。先前的磁化结果表明，自旋系统由相互弱耦合的反铁磁三聚体组成。我们推测，磁化平台来源于三聚体的离散能级。为了确定离散能级，我们对SrMnPO粉末进行了非弹性中子散射实验。观测到的磁激发与三聚体模型中预期的激发是一致的。
A quantum-mechanical 1/3 magnetization plateau and magnetic long-range order appear in the large-spin (5/2) substance SrMnPO. Previous magnetization results suggest that the spin system consists of antiferromagnetic trimers that are weakly coupled with one another. We inferred that the magnetization plateau originated from discrete energy levels of the trimer. In order to confirm the discrete energy levels, we performed inelastic neutron-scattering experiments on SrMnPOpowders. Observed magnetic excitations are consistent with excitations expected in the trimer model.