No abstract

Nernst coefficient measurements of La 0.88 MnO 3 ͑T c ϳ265 K͒ are reported as a function of temperature ͑100-320 K͒ in moderate applied magnetic fields (0.38ϽHϽ1.8 T͒. For TϾT c , our data can be accounted for by the transport behavior of small polarons. We find the semiconductor to metal transition is dominated by an increase in the hole density. For TрT c , an anomalous suppression of the Nernst coefficient was observed when the field increased from 0.38 to 1.8 T. The giant magnetoresistance effect is attributed to a field increased mobility of the charge carriers. ͓S0163-1829͑99͒50214-2͔

No abstract

No abstract

No abstract