Dy(Fe,M)_(12)(M=Si,Ti,V)合金的Mssbauer谱学研究

The Mssbauer Spectroscopy Studies of Dy (Fe,M)_(12)(M=Si,Ti and V) Alloys

DyFe_(10)Si_2合金的^(57)Fe变温Mssbauer谱学研究,发现温度在210K处,超精细场随温度有不连续变化。此温度对应于合金的自旋重取向温度。Si,Ti和V作为形成ThMn_(12)型结构的稳定化元素,造成各相应合金的自旋重取向温度有一些差别。分析了Si,Ti和V元素造成合金磁晶各向异性差别的原因,它使得DyFe_(10)V_2,DyFe_(11)Ti和DyFe_(10)Si_2合金的自旋重取向温度不同。DyFe_(10)Si_2合金的8i晶位四极劈裂在温度210K处改变符号。

Spin reorientation temperature of DyFe_(10)Si_2 alloys from plane at low temperature to c-axis at high temperature are observed at 210 K by means of Mossbauer spectroscopy. The Si, Ti and V elements to from the stable ThMn_(12) phase can affect the spin reorientation temperature. The differences of magnetic anisotropy of YFe_(10)V_2, YFe_(11)Ti and YFe_(10)Si_2 have been discussed here, The quadraple splitting of 8i crystal site changes sign at 210 K.