Magnetoresistance Coefficients and Their Temperature Dependence in Iron and Silicon-Steel

By using single-crystal strips of iron and silicon steel having the crystallographic orientations (001)-[100] and ($1\overline{1}0$)-[111], the magnetoresistance coefficients ${\rho }_1$, ${\rho }_2$, and their temperature dependence were measured below room temperature. The measurement of ${\rho }_1$ was accomplished by changing the domain structure in the demagnetized state by utilizing the magnetic field induced by the measuring current in the sample. It is found that both ${\rho }_1$ and ${\rho }_2$ are strongly dependent on temperature and composition, but it seems difficult to obtain a complete quantitative interpretation of the results.