Pressure Dependence of the Intrinsic Magnetization of Iron and Nickel

The relative change in the saturation flux, $\frac{\Delta {\Phi }_s}{{\Phi }_s}$, has been observed on Fe and Ni at room temperature in the range up to 11 000 kg/${\mathrm{cm}}^2$ in hydrostatic pressure. It decreases almost linearly as the pressure increases for both Fe and Ni. In the derivation of the pressure coefficient of the specific intrinsic magnetization, ${{\sigma }_s}^{-1\mathrm{}}\left(\frac{\Delta {\sigma }_s}{\Delta p}\right)$, the demagnetizing field of the specimen was taken into consideration. The ${{\sigma }_s}^{-1\mathrm{}}\left(\frac{\Delta {\sigma }_s}{\Delta p}\right)$ obtained is -3.04×${10}^{-7\mathrm{}}$ ${(\mathrm{k}\mathrm{g}/{\mathrm{cm}}^2)}^{-1\mathrm{}}$ for Fe and -2.38×${10}^{-7\mathrm{}}$ ${(\mathrm{k}\mathrm{g}/{\mathrm{cm}}^2)}^{-1\mathrm{}}$ for Ni.