The Magnetic Anisotropy of Iron-Nickel (50-50) Thin Film Induced by Neurton and α-Particle Irradiation

概要

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Measurements of the magnetic anisotropy induced by irradiation of reactor neutrons or 1.47MeV α-particles at 563°K in a magnetic field of about 2000 Oe were made on the evaporated Fe-Ni(50%-50%) thin films of single and polycrystalline structures. The observed induced uniaxial anisotropy was a few times larger than that of the bulk alloys. The temperature dependence of this anisotropy was measured at temperatures from 77°K to 663°K and fits quite well with the third power of the magnetization. Above 573°K, the magnetic anisotropy decreases with increasing temperature and time of heat treatment. The temperature dependence is well described by assuming the activation energies of 0.55eV between 573°K and 773°K and 2eV about 773°K.
社団法人日本物理学会の論文
1970-03-05