Electron Transport Properties of Eu(Cu_1 − xAg_x)₂Si₂ (0 ≤ x ≤ 1): Initiation of Transition Eu²⁺ ↔ Eu^2.41+ in the Intermediate Valence State

Figure 8

Temperature dependence of the selected part of the reduced resistivity ρ_mag (T) in the system Eu(Cu_1 − xAg_x)₂Si₂ samples is defined as follows: (а) (ρ_mag1): Δρ/ρ₃₀₀ ≈ Δ_Eu,Cu(ρ/ρ₃₀₀) = ρ/ρ₃₀₀(Eu(Cu_1 − xAg_x)₂Si₂) − ρ/ρ₃₀₀(EuAg₂Si₂), х = 0. 0 (1); 0.05 (2); 0.125 (3); 0.25 (4); 0.50 (5); 0.75 (6); and 0.875 (7) and (b) (ρ_mag2): Δρ/ρ₃₀₀ ≈ Δ_Eu,Ag(ρ/ρ₃₀₀) = ρ/ρ₃₀₀(Eu(Cu_1 − xAg_x)₂Si₂) − ρ/ρ₃₀₀(LaCu₂Si₂), х = 0, 0 (1); 0.05 (2); 0.125 (3); 0.25 (4); 0.50 (5); 0.75 (6); 0.875 (7); and 1 (8).

(a)

(b)