Neutron Scattering Study of Magnetic Excitations in Pseudo-One-Dimensional Singlet Ground State Ferromagnets CsFeCl 3 and RbFeCl 3
Neutron Scattering Study of Magnetic Excitations in Pseudo-One-Dimensional Singlet Ground State Ferromagnets CsFeCl 3 and RbFeCl 3
复制标题
伪一维单线态基态铁磁体CsFeCl 3 和RbFeCl 3 磁激发的中子散射研究
DOI：
10.1143/jpsj.49.144
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发表时间：
1980
影响因子：
1.7
通讯作者：
K. Hirakawa
中科院分区：
文献类型：
--
作者：
H. Yoshizawa;W. Kozukue;K. Hirakawa
用非弹性中子散射技术观测了赝一维平面铁磁体CsFeCl3和RbFeCl3的磁激发谱。观察到CsFeCl3的激发谱在磁区中心有一个能隙，而RbFeCl3的激发谱没有能隙，具有XY系统的特征。这种显著的差异可以从它们是单重基态系统的事实来理解。由于RbFeCl 3由于交换诱导矩而具有3D LRO，CsFeCl 3在我们测量的温度范围内没有显示LRO的迹象。此外，从温度依赖性的观点来看，值得注意的是，RbFeCl3的激发光谱即使在顺磁相中也显示出XY系统的特征。CsFeCl 3和RbFeCl 3的一维度分别为0.05和0.1，表明它们具有出乎意料的差的一维度。
The magnetic excitation spectra in pseudo-one-dimensional planar ferromagnets CsFeCl 3 and RbFeCl 3 were observed using inelastic neutron scattering technique. The observed excitation spectruun of CsFeCl 3 has a gap at the magnetic zone center, while that of RbFeCl 3 has no gap with a feature of XY system. This prominent difference can be understood from the fact that they are singlet-ground-state systems. As RbFeCl 3 has a 3D LRO due to an exchange induced moment, CsFeCl 3 shows no sign of the LRO within the temperature region we measured. Moreover, from a viewpoint of the temperature dependence, it is noticeable that the excitation spectrum of RbFeCl 3 shows the feature of XY system even in the paramagnetic phase. The one-dimensionality is evaluated to be about 0.05 for CsFeCl 3 and 0.1 for RbFeCl 3 showing that they have unexpectedly poor one-dimensionality.