非晶态Fe_（77）Cr_（13）Zr_（10）合金的临界现象

Critical Phenomena of Amorphous Fe77Cr13Zr10 Alloy

测量了非晶态Ｆｅ７７Ｃｒ１３Ｚｒ１０合金的磁化强度与温度和磁场的关系．在居里点附近样品的磁特性符合二级相变规律，得到临界指数β＝０．４０，γ＝１．４５，δ＝４．８５，样品的居里温度Ｔｃ＝（２１２．１±０．３）Ｋ．在实验误差范围内，临界指数β、γ、δ满足关系式γ＝β（δ－１），在１９０～２５０Ｋ温度范围内，实验数据满足二级相变的磁状态方程．

The temperature dependence of magnetization of amorphous Fe77Cr13Zr10 alloy have been measured in the temperature range 1. 5 to 300K in several fields. The behaviour near the Curie temperature is found to obey second-order phase transition laws with critical indices: β=0. 40;γ=1. 45;δ=4. 85,and the Curie temperature Tc= (212. 1 ±0 3)K. Within experimental error the critical indices satisfy the scaling law relationship γ=β(δ-1). The data satify the magnetic equation of state characterestic of a second-order phase transition in the temperature range 190 to 250K.