Magnetic, thermal, and transport properties of ${\mathrm{Fe}}_{100\mathrm{-}\mathit{x}}$${\mathrm{V}}_{\mathit{x}}$ and (${\mathrm{Fe}}_{100\mathrm{-}\mathit{x}}$${\mathrm{V}}_{\mathit{x}}$${)}_{83}$${\mathrm{B}}_{17}$ alloys

Polycrystalline ${\mathrm{Fe}}_{100\mathrm{-}\mathit{x}}$${\mathrm{V}}_{\mathit{x}}$ with x=1.2–25 at. % and amorphous (${\mathrm{Fe}}_{100\mathrm{-}\mathit{x}}$${\mathrm{V}}_{\mathit{x}}$${)}_{83}$${\mathrm{B}}_{17}$ with x=0–19.3 at. % were prepared. The physical properties measured for these samples included the magnetic moment, the high-field susceptibility, the specific heat, the residual resistivity, and the anisotropic magnetoresistance at low temperatures. We have now more experimental data for ${\mathrm{Fe}}_{100\mathrm{-}\mathit{x}}$${\mathrm{V}}_{\mathit{x}}$ alloys to test the prediction of the split-band model. As to (${\mathrm{Fe}}_{100\mathrm{-}\mathit{x}}$${\mathrm{V}}_{\mathit{x}}$${)}_{83}$${\mathrm{B}}_{17}$ alloys, the complications of the spin-glass property and the strong increase of resistivity due to s-s scattering make the test very difficult. However, the existence of a maximum in the high-field susceptibility in (${\mathrm{Fe}}_{94.2}$${\mathrm{V}}_{5.8}$${)}_{83}$${\mathrm{B}}_{17}$ indicates a near degeneracy at the Fermi level, which may or may not be associated with the split-band model.