Field emission studies on well adhered pulsed laser deposited LaB6 on W tip.

Authors :: Late, Dattatray J.
More, Mahendra A.
Joag, Dilip S.
Misra, Pankaj
Singh, B. N.
Kukreja, Lalit M.
Source :: Applied Physics Letters. 9/18/2006, Vol. 89 Issue 12, p123510. 3p. 2 Black and White Photographs, 2 Graphs.
Publication Year :: 2006
Abstract: Lanthanum hexaboride films have been deposited on a tungsten tip by pulsed laser deposition technique. The field emission studies have been performed in the conventional field emission geometry. The Fowler-Nordheim plot obtained from the current-voltage characteristic is found to be linear in accordance with the quantum mechanical tunneling phenomenon. A current density of 1.2×104 A/cm2 is drawn from the deposited tip. The field enhancement factor is calculated to be 5537 cm-1, indicating that the field emission is from nanoscale protrusions present on emitter surface. The emission current-time plots show the very good stability of the emitter. [ABSTRACT FROM AUTHOR]