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Photoelectric and Thermionic Properties of Nickel
Phys. Rev. 76, 125 – Published 1 July, 1949
DOI: https://doi.org/10.1103/PhysRev.76.125
Abstract
The photoelectric and thermionic properties of spectroscopically pure nickel were studied through a wide range of temperatures including the Curie temperature, 350°C. The samples were studied after having been subjected to long outgassing processes. A marked change occurs in the slope of the temperature-photoelectric current curves at the Curie temperature. This change is accounted for by an increase in the work function and a change in the probability factor . The work function of carefully outgassed nickel was found to be 5.05±0.05 electron volts below 623°K. At this temperature the work function increases becoming 5.20±0.05 electron volts at 1108°K. A work function of 5.24 electron volts was determined thermionically at temperatures of 1150°K and above.
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