“…[18][19][20] The transport phenomena of LaCoO 3 have been intensively investigated for various di/tri-valent ion substitutions (Ca 2+ , Sr 2+ , Ba 2+ , Gd 3+ , Y 3+ , Mg 2+ , Al 3+ , Mn 3+ , Ni 2+ , Fe 3+ ) on both A and B sites. 19,[21][22][23][24][25] Among these, Sr 2+ substitution at the La 3+ site (i.e., La 1−x Sr x CoO 3 or LSCO) has shown spin glass insulating to ferromagnetic (FM) metallic state transition along with the thermoelectric properties at room temperature. [26][27][28][29][30] Thermoelectric efficiency of the La 1−x Sr x CoO 3 is observed to be maximum for 5% Sr substitution i.e., La 0.95 -Sr 0.05 CoO 3 , having a room temperature (RT) value of ZT ∼ 0.06.…”