Pressure Effects Estimated from Forced Volume Magnetostriction for Ni–Tm [Tm=Ti, V, Cr, Mn] Alloys

Abstract

Pressure effects on magnetic moment μ and Curie temperature T_c have been estimated indirectly from forced volume magnetostriction dω⁄dH measured by 3-terminal capacitance method instead of strain gauge technique for Ni–Tm [Tm=Ti, V, Cr, Mn] alloys. The relation between pressure coefficients, d ln μ⁄dp and d ln T_c⁄dp, are analyzed according to Inoue-Shimizu discussion. The values of the coefficient C⁄χ_hfT_c obtained seem to decrease gradually to about 1 in the limit of weak itinerant ferromagnet with decreasing T_c toward 0 K for Ni–Tm [Tm=Ti, V, Cr] alloys except for Ni–Mn alloys.