论文标题
准晶体的结构和磁性属性大约au $ _ {65} $ ga $ _ {21} $ tb $ _ {14} $
Structural and magnetic properties of the quasicrystal approximant Au$_{65}$Ga$_{21}$Tb$_{14}$
论文作者
论文摘要
磁化和中子衍射实验研究了准晶体近似au $ _ $ _ {65} $ ga $ _ {21} $ tb $ _ {14} $的磁性属性。磁敏感性和磁化曲线的温度依赖性表示主要的铁磁相互作用，而从中子衍射实验中发现了旋转的抗磁磁性。在抗铁磁相中，磁矩几乎垂直于伪五倍的对称轴对准，该轴应与TB原子的易于轴方向相对应。尽管电子的每个原子比的差异，但与Au $ _ {72} $ al $ _ {14} $ tb $ _ {14} $相似的磁性特性表明，易于轴各向异性的稳健性反对非磁性原子的化学替代。
Magnetic properties of the quasicrystal approximant Au$_{65}$Ga$_{21}$Tb$_{14}$ were investigated by the magnetization and the neutron diffraction experiments. The temperature dependences of the magnetic susceptibility and the magnetization curve indicate dominant ferromagnetic interactions, while the whirling antiferromagnetic order was found from the neutron diffraction experiments. In the antiferromagnetic phase, the magnetic moments are aligned almost perpendicular to a pseudo five-fold symmetry axis, which should correspond to the easy-axis direction of a Tb atom. The magnetic properties similar to those of Au$_{72}$Al$_{14}$Tb$_{14}$ in spite of the difference in the electron-per-atom ratio suggest the robustness of the easy-axis anisotropy against the chemical substitution of the nonmagnetic atoms.
