Shear susceptibility - A universal integral parameter relating the shear softening, heat effects, anharmonicity of interatomic interaction and “defect” structure of metallic glasses

We studied shear modulus relaxation and heat effects occurring upon structural relaxation of La-, Zr- and Pd-based bulk metallic glasses. On this basis, we suggest a new method for the determination of the shear susceptibility, which appears to constitute a universal integral parameter relating different physical phenomena - shear softening, heat effects and anharmonicity of interatomic interaction - with the “defect” structure of metallic glasses.