THERMOCOUPLE JUNCTIONED WITH FERRITES

Measurements are reported of the thermo-e.m.f. of a thermoelectric jun ction composed of polycrystalline ferrites or multilayered ferrite fil ms as a function of the temperature. The thermo-e.m.f. of the bulk and ferrite films was much larger than that of the conventional thermoele ctric junction made of metals. A positive or negative thermoelectric p ower was observed depending on the difference in the combination of fe rrites. The temperature dependence was almost linear from room tempera ture up to about 500 degrees C and above which it showed a tendency to saturate. Application of a magnetic field had a reducing effect upon the thermo-e.m.f. at temperature of room to the Curie temperature.