Magnetostriction and the local order of Co-Nb-B glasses

Abstract
The saturation magnetostriction λs for Co80NbxB20−x glasses increases smoothly from −4×10−6 to zero as B is replaced by Nb. The temperature dependence of λs in two Co-Nb-B glasses vanishes abruptly near 150 °C, several hundred degrees below TC . These data cannot be fit with combinations of one-ion and two-ion components. Rather, we believe this result to be a reflection in ‖λs‖ of a local structural transformation observed in these glasses.