A New Explanation for the Magnetic Memory of α-Fe2O3 on the Basis of a Negative Pressure Effect on the Morin Transition Point

Abstract
An α-Fe2O3 crystal was subjected to a negative hydrostatic pressure by mechanically stretching the crystal in several directions. The decrease of the Morin transition point was detected using an astatic magnetometer placed underneath the crystal. A new explanation of the memory effect of the remanent magnetism of the crystal is given.