Beschreibung:
The effect of mechanical tensile stresses 0⩽σ⩽62 MPa on the low-field (0⩽H⩽45 Oe) magnetization curves of the metallic glasses Fe100−xBx (x=14,16,17,20) is studied at temperatures of 77 and 300 K. The correlation between the electronic structure of the glasses and their magnetostrictive sensitivity κs is revealed: the eutectic metallic glass Fe83B17, which possesses a special electronic structure with a 30% lower conduction (sp) electron density, has a value of κs differing substantially from that of the other metallic glasses studied. Under low stresses (0⩽σ⩽22 MPa) the eutectic alloy possesses a magnetostrictive sensitivity κs(σ1) which is higher than that of the rest of the alloys studied, while under high stresses (22 MPa⩽σ⩽62 MPa) its magnetostrictive sensitivity κs(σ2) is close to zero.