Fig. 1. Schematic diagram of Casimir-Polder torque between a two-level atom and saturated ferrite material surface

Fig. 2. The Casimir-Polder torque between two-level atom and ferrite plate versus atomic position（insets：the curves at shorter distances）

Fig. 3. The Casimir-Polder torque between two-level atom and ferrite plate versus atomic transition frequency

Fig. 4. The Casimir-Polder torque between the two-level atom and the ferrite as functions of ${\omega }_{\mathrm{e}\mathrm{x}}$ for different atomic transition frequencies

Fig. 5. The Casimir-Polder torque between the two-level atom and the ferrite as functions of ${\omega }_{\mathrm{e}\mathrm{x}}$ for different atomic position

Fig. 6. The relative Casimir-Polder torque between the two-level atom and the ferrite as functions of ${\omega }_{\mathrm{e}\mathrm{x}}$

Fig. 7. The Casimir-Polder torque versus atomic transition frequency under the perturbation of $\pm \Delta$ on the circular polarization plane