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如果金属玻璃的饱和磁致伸缩常数λ_s具有各向异性,则用不同方法测量的λ_s将有不同的意义。为了简单,假设面内饱和线磁致伸缩S遵从关系式其中θ和ψ分别为饱和磁化强度M_s和测长方向l在以固定在材料中的参考方向R为极轴时的极角,λ_s(θ)为随θ而变的λ_s。在此基础上导出了用应变法、张力转矩法和张力磁化法所测有效饱和磁致伸缩常数λ_s~*(θ)与λ_s(θ)之间的关系式。用它们分析了已有的结果。用不同方法或同一方法的不同操作所得λ_s(θ)结果之间的方法暗示,λ_s的测量尚需进一步改进。
If the saturated magnetostriction constant? S of the metallic glass is anisotropic, λ_s measured by different methods will have different meanings. For the sake of simplicity, it is assumed that the in-plane saturation line magnetostriction S obeys the relation where θ and ψ are respectively the saturation magnetization M_s and the length-measuring direction l, the polar angle at the polar axis R in the reference direction fixed in the material, λ_s ( θ) is λ_s that varies with θ. On this basis, the effective saturation magnetostriction constants λ_s ~ * (θ) and λ_s (θ) measured by the strain method, tension torque method and tension magnetization method are derived. Use them to analyze the existing results. The method between λ_s (θ) results obtained by different methods or different operations of the same method implies that the measurement of λ_s needs to be further improved.