Abstract
A complex magnetic, structural, transport and thermal investigation has been performed using a series of well sintered ceramics in the x=0.50–0.60 range. Fine steps of the substitution of Sr2+ for Pr3+ enabled us to evidence the evolution of magnetic transtions with x and to exemplify the impact of concentration of eg electrons on charge carrier and thermal transport. The lowering of x from 0.56 down to 0.50 led to the concomitant decrease of the low temperature electrical conductivity and thermoelectric power pointing thus to impeded charge carrier transport for samples with x∼0.5. Nonetheless, the band-like character of eg carriers for these compounds was independently confirmed by low temperature specific heat measurement.
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