Magnetocrystalline Anisotropy Energy and Its Field Dependence of Ni–Pd Alloys

抄録

The magnetocrystalline anisotropy energy difference ΔE_a between the ⟨111⟩ and ⟨100⟩ directions and its field dependence dΔE_a⁄dH of Ni–Pd alloys have been studied in the temperature range from 4.2 K to 300 K and the magnetic field up to 20 kOe. At the concentration near 48 at%Pd, ΔE_a shows the change in sign and has the extreme values, −5.1×10⁵ erg/cm³ and +3.2×10⁵ erg/cm³, at about 20 at%Pd and 60 at%Pd, respectively. Temperature dependence of ΔE_a is very steep in Ni rich region and gentle in Pd rich region. At the concentration near 60 at%Pd, dΔE_a⁄dH shows the change in sign and have the extreme values −0.67 erg/cm³ Oe and +0.50 erg/cm³ Oe at about 40 at%Pd and 70 at%Pd, respectively.