【摘要】 本文用中子衍射对Nd₂(Fe_0.9Si_0.1)₁₄B在室温及77K进行了测量,用衍射峰的形状分析法进行了数据拟合。结果表明,在室温,Si择优占据4c,8j₁及16k₂晶位;Nd与Fe的磁矩平行于C轴排列。在77K,Si仍择优占据上述三个晶位。算得的Nd磁矩的方向偏离C轴37.8°。更多还原

【Abstract】 The neutron diffraction of Nd₂(Fe_0.9Si_0.1)₁₄B has been measured at room temper-ature and 77 K. Their data were fitted by profile analysis method. From the data at room tem-perature it can be got that Si occupied preferentially the sites 4c, 8j₁ and 16k₂; the magneticmoments, both Nd and Fe, are parallel to C axis. From the neutron data at 77 K it can beshown that Si still occupied the same sites as the sample at room temperature, but the data fitwith Nd moments deviating C axis and Fe moments parallel to c axis is better than all mo-ments parallel to C axis. It seems to prove that the Nd spin reorientation takes place at 77 K.更多还原