Non-linear magnetotropic susceptibility in FePS₃

Area of Science:

• Condensed Matter Physics
• Materials Science
• Magnetism

Background:

• Magnetotropic susceptibility quantifies magnetic anisotropy by measuring free energy curvature relative to magnetic field orientation.
• Non-linear magnetic torque behavior observed in FePS3 necessitates investigation into its magnetotropic susceptibility.

Purpose of the Study:

• To derive and analyze non-linear magnetotropic susceptibility expressions for FePS3.
• To understand the contributions of individual parameters to the material's magnetic behavior.

Main Methods:

• Derivation of non-linear magnetotropic susceptibility for FePS3 in ac* and bc* planes.
• Utilized complementary approaches: first derivative of torque and formal susceptibility calculation.
• Incorporated higher-order magnetization terms and applied C2h point group symmetry constraints.

Main Results:

• Developed theoretical expressions for non-linear magnetotropic susceptibility in FePS3.
• Analyzed the behavior of these expressions, identifying parameter contributions.
• Theoretical results demonstrate good agreement with preliminary experimental data.

Conclusions:

• The derived non-linear magnetotropic susceptibility expressions provide a theoretical framework for FePS3.
• The study offers valuable insights for interpreting and guiding experimental investigations of magnetic anisotropy in FePS3.
• This work enhances the understanding of complex magnetic phenomena in layered materials.