The adsorption of lanthanum hexaboride on tantalum

✍ Scribed by JG Ociepa; S Mróz

• Book ID: 104264917
• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 288 KB
• Volume: 29
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(79)80646-6

✦ Synopsis

The work function of the lanthanum hexaboride (LaBs) layer evaporated on a tantalum ribbon surface was measured as a function of the evaporation time, using thermionic diode and electron beam methods. The work function decreases rapidly, passes through a minimum and saturates. The value of ~Om~n depends strongly on the temperature of the tantalum ribbon (2.8, 2.5 and 1.7 eV for 868, 715 and 20°C, respectively). Diffusion of some species (maybe lanthanum) from the evaporated layer to the clean part of the tantalum ribbon was observed and the activation energy for diffusion (1.7 eV/atom) was measured.