You may go through this publication for such analysis.
Phys. Rev. B 107, 214405 (2023)
The presence of phase transitions, such as paramagnetic to ferromagnetic (PM to FM), can be identified by analyzing the behaviour of the curves. The Curie temperature can be determined from the minimum of dM/dT. Features like bifurcation or the presence of a cusp in the ZFC/FC curves may indicate anisotropy, spin glass behaviour, or the coexistence of interactions like FM and AFM. Additionally, consulting the relevant literature is advised for a deeper understanding.
1. From Curie-Weiss fitting in high temperature region, the information that can be extracted are following:
a. Nature of magnetic interaction in ground state, from the sign of paramagnetic Curie temperature
b. If paramagnetic Curie temperature is much greater than magnetic ordering temperature, the system is accompanied with disorder. In such disorder system, high magnetic field properties are too much interesting.
c. Effective magnetic moment in the system. From effective magnetic moment, one can get an idea about how the magnetic atoms in this compound contributes to the magnetization.
2. From low temperature data, it is concluded that the system has multiple magnetic transitions, i.e. the low temperature magnetic structure is quite complex. The system is not a simple ferromagnet or antiferromagnet system. To get exactly the magnetic structure, one can go for powder neutron diffraction.
3. The FC-ZFC bifurcation, commonly known as thermomagnetic irreversibility, can be connected to various factors including domain wall pinning, presence of quenched disorder, magnetic anisotropy, or glassyness.
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