Unraveling thermally induced spin reorientation of composite component NdFe0.5Cr0.5O3 system.

• The thermomagnetic curve of NdFe 0.5 Cr 0.5 O 3 composite system was simulated by molecular field model and Monte Carlo method. • It was found that due to the random distribution of B site ions in NdFe 0.5 Cr 0.5 O 3 , cluster complexes with multiple Fe or Cr are easy to appear, and have complementary proportions. • In the process of spin reorientation, the effective spin of Nd3+ion at A site will also change with temperature. • The exchange constant of each phase in the composite system is estimated. Sophisticated spin instruments require high-precision spin control. In this study, we accurately study the intrinsic magnetic properties of the strongly disordered system NdFe 0.5 Cr 0.5 O 3 through molecular field models combined with anti-site defects (ASD) theory. The three constituent sub-magnetic phases of the system are separated, and their magnetization contributions are calculated separately. Fitting the angle of the A/B magnetic moment at a given temperature, the reorientation temperature point and temperature dependence of different magnetic phases are obtained. This research will provide a very good theoretical support for studying complex disordered systems and applying high-precision spin control and lay a foundation for the design of new functional materials. [ABSTRACT FROM AUTHOR]