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 4

Composition dependence of the effective valence ϑ_eff of europium in Eu(Cu_1 − xAg_x)₂Si₂ alloys at T = 300 K: 1—according to EuL_III-absorption spectra, black solid line—B-spline; 2—according to isomeric shift, Mössbauer effect, red solid line—B-spline [8, 9].