Proceedings of the 43rd International Field Emission Symposium
J. Phys. IV France 06 (1996) C5-153-C5-158
A New Experimental Method of the Determination of the Evaporating FieldsO.L. Golubev
A.F.Ioffe Physical-Technical Institute, Russian Academy of Science, Polytekhnicheskaya 26, St. Petersburg 194021, Russia
A new experimental method of the determination of the evaporating fields Fev based on Fowler-Nordheim theory is described. This method fits to any materials both refractory and fusible. Especially this method is effective for the thermo-field microprotrusions. The microprotrusions have usually the radii of curvature r≈10-100 Å and one or some atoms on the top and well-known methods of Fev determination are not suitable. Besides that the values of Fev for this small objects are considerable less in comparison with the Fev for the "large" tips. This method requires for realisation only a simple field electron microscope. The exactness of this method is limited by the exactness of the determination of the field factor ß by means of Fowler-Nordheim plots and by the applicability of Fowler-Nordheimtheory to the microprotrusions.
© EDP Sciences 1996