EMR Study of Electronic and Magnetic Ordering in Doped CaMn _{1-x, y}M^{x, y}O³ (M = Ru, Mo) perovskites

X-band electron magnetic resonance measurements of polycrystalline CaMn_{1-x, y} M_{x, y}O₃ (M = Ru, 0 ≤ x ≤ 0.5; M = Mo, 0 ≤ y ≤ 0.14) samples were performed at 120 K ≤ T ≤ 540 K. The observed anomalies of electron magnetic resonance parameters correlate pretty well with the temperatures of antiferro-, ferromagnetic-like, and orbital/charge-ordering transitions in these systems and specify phase diagrams obtained by other techniques. However, a strong difference between resonant properties of Ruand Mo-doped series is observed in both paramagnetic and magnetically ordered states. To describe such a difference, the energy bands diagrams, which comprise the deep impurity t_2g-like states + e _g-like conductive band for CaMn_1-xRu_xO ₃ and shallow impurity states + conductive band, both having e _g-like symmetry, for CaMn_1-y Mo_yO₃, are proposed. Specific electrons' contribution to the electron magnetic resonance line width explains concentration and temperature dependences of this parameter in the para-magnetic state in considered systems.