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Effect of hydrostatic pressure on the Curie temperature of the Heusler alloys Ni2MnZ(Z = Al, Ga, In, Sn and Sb)

1987; Elsevier BV; Volume: 65; Issue: 1 Linguagem: Inglês

10.1016/0304-8853(87)90312-x

1873-4766

T. Kanomata, K. Shirakawa, T. Kaneko,

Magnetic Properties of Alloys

The pressure derivative of the Curie temperature dTc/dp of the Heusler alloys Ni2MnZ(Z = Al, Ga, In, Sn and Sb) has been obtained from the results of temperature dependence of initial permeability under pressure up to about 6 kbar. For all alloys the Curie temperatures increase linearly with increasing pressure at the rate of dTc/dp: +0.7 K/kbar for Ni2MnAl, +1.0 K/kbar for Ni2MnGa, +0.9 K/kbar for Ni2MnIn, +1.4 K/kbar for Ni2MnSn and +4.1 K/kbar for Ni2MnSb. On the basis of these results, the interatomic dependence of the exchange interaction for Heusler alloys is discussed. The magnetic susceptibilities of those alloys are also reported.