Abstract
The temperature dependence of Young's modulus of transition metal-metalloid amorphous alloys, (Fe1-xM)85B15 (M: Cr, Mn, Co, Ni), (Fe1-xMx)77Si10B13 (M: Co, Ni), Fe-B, Fe-P, Co-B, has been measured by a pulse echo delay-line technique in the temperature range from R.T. to 600°C. Young's modulus Es measured under the saturation of magnetization for Mn and Cr containing alloys shows softening below Tc because of the magnetovolume effect. The contribution of the magnetovolume effect to Young's modulus is quantitatively analysed and its dependence on the electron number per transition metal atoms neff is presented. The magnetovolume contribution to Young's modulus passes through a maximum at neff∼8.0 and smears above neff∼8.3. These results are discussed in connection with the anomalous stress dependence of the magnetovolume coupling constant in the transition metal-metalloid amorphous alloys.
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