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The effect of Dy doping on magnetism of La 0.7 Sr 0.3 CoO 3 system was studied through the measurements of M-T curves and M-H curves. The results show that with Dy content increasing, T C decreases, M weakens, the coercive force strengthens, and the samples exhibit the abnormal phenomenon that M increases continuously with T decreasing in low temperature range. Research indicates that the variation of magnetism in the system comes from the changes of lattice parameters and magnetic environment caused by Dy doping and from the spin-state transition of Co ions induced by Dy ions.
The effect of Dy doping on magnetism of La 0.7 Sr 0.3 CoO 3 system was studied through the measurements of MT curves and MH curves. The results show that with Dy content increasing, TC decreases, M weakens, the coercive force strengthens, and the samples exhibit the abnormal phenomenon that M increases continuously with T decreased in low temperature range. Research indicates that variation of magnetism in the system comes from the changes of lattice parameters and magnetic environment caused by Dy doping and from the spin-state transition of Co ions induced by Dy ions.