We investigated the field dependences of magnetization M(H), the temperature dependences of magnetic susceptibility χ(T), and specific heat C(T) of orthorhombic ErFe₂Al₁₀ and ErRu₂Al₁₀ single crystals in a temperature range of 0.46–300 K. For ErFe₂Al₁₀, an antiferromagnetic phase transition was observed at the Néel temperature T_N 1.7 K, and M(H) of the b-axis at 0.47 K indicated a metamagnetic transition at 0.07 T. The easy axis in M(H) and χ(T) curves is the b-axis and the hard axis is the c-axis. A large anisotropy was seen in M(H) and χ(T) curves in the three crystal axes. In the case of ErRu₂Al₁₀, magnetic successive phase transitions were observed at 1.3 and 1.0 K. Spin-flops were observed in M(H) curves at 0.25 T on the a- and b-axes in 0.46 K. The easy axis in M(H) curves is the a-axis and the hard axis is the c-axis. We proposed a magnetic structure from the result of χ(T) curves, whereby the magnetic moment of Er was perpendicular to the c-axis and closely aligned to the [110] direction below T_N. The C(T) curve showed sharp peaks at corresponding temperatures. For both compounds, hump structures were observed in the temperature dependences of magnetic specific heat above T_N. These structures were Schottky anomalies that came from excited doublets.

我们研究了斜方晶ErFe ₂ Al ₁₀和ErRu ₂ Al ₁₀单晶在0.46–1的温度范围内的磁化强度M（H），磁化率χ（T）和比热C（T）的温度依赖性。 300K。对于ErFe ₂ Al ₁₀，在Néel温度T _N 1.7 K和b的M（H）处观察到反铁磁相变。轴在0.47 K处指示在0.07 T处有亚磁转变。M（H）和χ（T）曲线中的易轴为b轴，硬轴为c轴。在三个晶轴的M（H）和χ（T）曲线中观察到较大的各向异性。在ErRu ₂ Al ₁₀的情况下，在1.3和1.0 K处观察到磁性的连续相变。在0.46 K的a和b轴上，在0.25 T的M（H）曲线中观察到自旋翻转。在M（H）曲线是a轴，硬轴是c轴。我们根据χ（T）曲线的结果提出了一种磁性结构，其中Er的磁矩垂直于c轴并与T _N下方的[110]方向紧密对齐。所述Ç（Ť）曲线显示尖锐峰在对应的温度。对于这两种化合物，均在高于T _N的磁性比热的温度依赖性中观察到峰结构。这些结构是来自激发双峰的肖特基异常。