The Magnetostriction Behavior of Iron Single Crystals

The magnetostriction of iron single crystals has been measured as a function of temperature (77°K to 900°K), magnetic field (up to 14 kOe), and magnetic field orientation. These data have been used to evaluate the magnetostriction constants for two‐ and five‐constant expressions. The high‐temperature maximum in ${\lambda }_{100}$ as reported by Tatsumoto and Okamoto has been confirmed but not the low‐temperature maximum. A comparison of the five constants with the conventional magnetoelastic coupling theory revealed no correlation. The forced anisotropic magnetostriction constants have been evaluated as a function of temperature and found to be small for iron, while the volume effect was in agreement with previous results.