Magetic Properties and Grain Size of Metal Nickel Ultrafines Prepared in A Liquid Environment by Using γ-Ray Radiation

The magnetic properties and grain size of metal nickel ultrafines prepared from asoluble metalsates aqueous solution by using γ-ray radiation is presented in this paper.The coercivity （Hc） and specific magnetic moment （σ_s） of the metal mickel ultrafines is higher than those of responsible products obtained from other methods or the values reported in references. The relationship between magnetic properties （Hc and σ_s） with gain size, and grain size with radiation dose, are also discussed.