Anisotropic magnetic property of single-grained Al68Pd23Mn9 icosahedral quasicrystals
Anisotropic magnetic property of single-grained Al68Pd23Mn9 icosahedral quasicrystals
复制标题
单晶Al68Pd23Mn9二十面体准晶的各向异性磁性能
DOI：
10.1143/jpsj.62.4044
复制
发表时间：
1993
影响因子：
1.7
通讯作者：
M. Mori
中科院分区：
文献类型：
--
作者：
S. Matsuo;H. Nakano;T. Ishimasa;M. Mori
研究了具有高度结构完整性的单晶粒Al 68 Pd 23 Mn 9二十面体准晶的磁性。在40 K以下，在单晶粒准晶沿着5、3、2重轴磁化强度-磁场曲线的非线性区域，首次发现了与二十面体相的方向有序性有关的各向异性。在线性区域中没有发现各向异性，这与基于二十面体对称性的对称性考虑一致。磁化率服从Curie-Weiss定律，Curie-Weiss温度为-0.81K，表明磁矩间存在弱的反铁磁耦合。
Magnetic properties were studied for single-grained Al 68 Pd 23 Mn 9 icosahedral quasicrystals which had high degree of structural perfections. An anisotropy associated with the directional order in the icosahedral phase was found for the first time in the nonlinear region of the magnetization-vs-magnetic-field curve of the single-grained quasicrystal along 5-, 3-, and 2-fold axes below 40 K. No anisotropy was found in the linear region, which is consistent with a symmetry consideration based on the icosahedral symmetry. The magnetic susceptibility obeyed a Curie-Weiss law with a Curie-Weiss temperature -0.81 K which suggests a weak antiferromagnetic coupling between magnetic moments.