Cr对Fe-Zr基非晶合金电阻率及压力效应的影响

 在0.000 1~2.5 GPa范围不同静水压下，用四探针法详细测量了七种非晶态Fe_90-xCr_xZr₁₀合金（x=2、4、7、10、13、16、20）的电阻率。结果表明：（1）常压室温电阻率ρ₀与FeZr基非晶合金中Cr含量成N形曲线关系；（2）当静水压增加时，七种非晶合金的约化电阻率（ρ/ρ₀）都单调下降，x越大则电阻率下降的幅度越小；（3）非晶Fe_90-xCr_xZr₁₀合金电阻率的压力系数对x的变化相当敏感；（4）为方便查值，给出了六种典型静水压下ρ/ρ₀与x的曲线关系。最后，讨论了四种物理模型的选用以及相干交换散射在高压下的行为。

INFLUENCE OF Cr-CONTENT ON BOTH RESISTIVITY AND ITS PRESSURE EFFECT IN AMORPHOUS Fe-Zr BASE ALLOYS

The resistivity of amorphous Fe_90-xCr_xZr₁₀ (x=2, 4, 7, 10, 13, 16, 20) alloys was measured in detail by a 4-probe dc technique under different hydrostatic pressure from 0.000 1 GPa to 2.5 GPa. It is observed that: (1) The resistivity ρ₀ at room temperature and atmosphere pressure varies in a manner similar to the alphabet N as the content of Cr in amorphous Fe-Zr base alloys increases; (2) Relative resistivity ρ/ρ₀ of amorphous Fe_90-xCr_xZr₁₀ alloy drops monotonously when the hydrostatic pressure increases, the more the content of Cr, the smaller the decrease of resistivity; (3) Pressure coefficient of amorphous Fe_90-xCr_xZr₁₀ alloys is quite sensitive to the variation in x; (4) Relation between ρ/ρ₀ and x under 6 typical pressure was given. Finally we discussed the seletion of four physical models and the behavior of coherent exchange scattering under high hydrostatic pressure.