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In this study, the sol-gel method synthesized the magnetic measurement andanalysis of single-phase polycrystalline perovskite DyFe1-xCrxO3 (DFCO). Theexperimental data were fitted and calculated by a four-sublattice molecularfield model. Unlike previous studies, we found that in DyFe1-xCrxO3, the spinof the A-site rare earth ion Dy3+ also changed simultaneously with the spinreorientation of the Fe3+/Cr3+ ions. The effective spin is defined as theprojection of the A site's total spin on the B site's spin plane, and the curveof temperature changes is obtained after fitting. With this theory, a veryaccurate thermomagnetic curve is obtained by fitting. This is convincing and,at the same time, provides a reference for the development of spintronicdevices in the future.

Calculation of Special Spin Behavior of Dy3+ in DyFe1-xCrxO3 System by Molecular Field Model