[14, 30, 31, 46, 47, 58]. Below, however, we consider both permittivities (7) and (8) on equal terms in order to obtain respective consequences on the role of magnetic properties in the framework of the proposed models. We will suggest new experimental tests which could shed additional light on the applicability of these models in the theory of thermal Casimir force. The permittivity of dielectric materials along the imaginary frequency axis is described in the framework of the oscillator model [59], where ω$_{j}$ = 0 are the oscillator frequencies, g$_{j}$ are the oscillator strengths, γ$_{j}$ are the relax- ation parameters, and K is the number of oscillators. ε$_{d}$ ( iξ ) = 1 + K ∑ j =1 g$_{j}$ ω 2 j + ξ 2 + γ$_{j}$ξ , (9) r ( n ) $_{TM}$(0 , k ⊥ ) = 1 , (10) r ( n ) TE $_{,D}$(0 , k ⊥ ) ≡ r ( n ) TE $_{,D}$(0) = µ (0) − 1 µ (0) + 1 . (11) III. DISTANCE DEPENDENCE OF THE CASIMIR FORCE FOR FERROMAG- NETIC METALS Here, we consider the Casimir interaction between two similar parallel plates made of ferromagnetic metal. We perform computations in order to investigate the role of magnetic properties for both the Casimir free energy per unit area and pressure. Keeping in mind the proximity force approximation [14], this allows one to apply the obtained results to the experimental configurations of a sphere above a plate and of two parallel plates, respectively. Let us consider the reflection coefficients (3) for two plates made of ferromagnetic metal at room temperature T = 300 K. In accordance with Sec. II, magnetic properties may contribute only at zero frequency. For the TM polarization of the electromagnetic field we arrive at where n = 1 , 2, i.e., the same result as for ordinary (nonmagnetic) metals. For the TE po- larization we arrive at different expressions depending on the model of dielectric permittivity used. Thus, for the Drude model (7) from Eq. (3) one obtains: 10