Physics of the Solid State
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Investigation of the initial stage of Cerium oxidation
Ashkhotov O. G.
1, Ashkhotova I. B.
1, Magkoev T. T.
2
1Kabardino-Balkaria State University, Nalchik, Russia
2Khetagurov North Ossetian State University, Vladikavkaz, Russia
2Khetagurov North Ossetian State University, Vladikavkaz, Russia
Email: oandi@rambler.ru, ashhotova-irina@rambler.ru, t_magkoev@mail.ru
The initial stages of oxidation of a massive Cerium sample at room temperature in an ultrahigh vacuum (oxygen partial pressure 10-6 Pa) after obtaining an atomically pure surface by bombardment with Ar+ ions were studied using electron Auger spectroscopy. It was found that chemisorption is observed initially when exposed to oxygen up to 5 L, from 5 to 14 L Ce2O3 nuclei are formed, followed by coalescence at exposures from 14 to 40 L. The process ends with the formation of a thick oxide film Ce2O3. Keywords: oxide, vacuum, adsorption, chemisorption, exposure, coalescence.
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