Abstract
The forced volume magnetostriction measured precisely in a relatively weak magnetic field shows a sharp maximum in the region of Curie temperature for a 36.4 at%Ni-Fe Invar alloy. The magnetovolume coupling constant C determined in the temperature range between room temperature and the Curie temperature is found to be approximately 1.2 ×10 -8 cm 6 /emu 2 and almost independent of the temperature, under the condition that the forced volume magnetostriction is related with the local magnetic moment and the high-field susceptibility due to the band term.
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