The magnetic properties of polycrystalline samples of isotopically enriched iron with the content of isotope 56Fe 99.945±0.002 at. % were investigated at different magnetic field strength values. The samples of monoisotopic iron were melted in the environment of argon and annealed in hydrogen. The same measurements were carried out on the samples of iron with natural isotopic composition. The quantity and composition of impurities in the samples of natural and monoisotopic iron were equal. The magnetic properties were measured using an automatic induction vibro-magnetometer MagEq MNMS 216 and an automatic measuring complex MK-3E in accordance with GOST 8.377-80 and GOST 12119.1-98. It was found that the value of the saturation magnetization Js of 56Fe is higher by 10.87% than that of natFe at room temperature, and by 11.35% at 100 K. The values of saturation induction Вs and residual magnetic induction Br for 56Fe are higher than for natFe. The difference in the values of the coercive force Нс for the natFe and 56Fe samples is due to the difference in the grain size of the samples and in the purity of the materials.Keywords: Monoisotopic 56Fe, natural iron, impurities, magnetic properties
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