Phenomenological Magnetic Model in Tsai-Type Approximants
Phenomenological Magnetic Model in Tsai-Type Approximants
复制标题
DOI：
10.7566/jpsj.85.053701
复制
发表时间：
2016-05-15
影响因子：
1.7
通讯作者：
Tamura, Ryuji
中科院分区：
文献类型：
--
作者：
Sugimoto, Takanori;Tohyama, Takami;Tamura, Ryuji
受最近在tsai型近似物Au-Si-REs （RE = Tb， Dy和Ho）中发现倾斜铁磁性的启发，我们提出了一个再现其磁性结构和热力学量的现象学磁性模型。在该模型中，近似正二十面体的立方对称性（m (3) / bar）在中子衍射实验确定的特殊磁结构中起着关键作用。我们的磁性模型不仅解释了准晶近似体中的磁性行为，而且为准晶中磁性长程序和非周期性共存的可能性提供了一个很好的起点。
Motivated by the recent discovery of canted ferromagnetism in the Tsai-type approximants Au-Si-REs (RE = Tb, Dy, and Ho), we propose a phenomenological magnetic model reproducing their magnetic structure and thermodynamic quantities. In the model, the cubic symmetry (m (3) over bar) of the approximately regular icosahedra plays a key role in the peculiar magnetic structure determined by a neutron diffraction experiment. Our magnetic model does not only explain magnetic behaviors in the quasicrystal approximants, but also provides a good starting point for the possibility of the coexistence between the magnetic long-range order and the aperiodicity in quasicrystals.