“…9,10 On the other hand, in the metallic region, the transport mechanism is governed by the single magnon's scattering contribution, the electron-magnon scattering mechanism, and electron-electron and electronphonon scattering processes. [11][12][13] In addition, a theoretical percolation model, proposed by Li et al, which is based on phase segregation between metallic and semiconductor regions, is used successfully in the entire temperature range. 14 In view of these facts, lot of efforts have been made to gain insights into the effect of Cr 3+ on the electrical properties of La 0.75 3+ Sr 0.25 2+ Mn 0.75−x 3+ Cr x Mn 0.25 4+ O 3 2− (0.15 ≤ x ≤ 0.25).…”