Analysis with a multilayer model of heating rate effect on thermally stimulated luminescence, conductivity and exoelectronic emission of alpha -Al sub 2 O sub 3

Analysis with a multilayer model of heating rate effect on thermally stimulated luminescence, conductivity and exoelectronic emission of alpha -Al sub 2 O sub 3

A theoretical model destined to analyse simultaneously thermally stimulated luminescence (TL), conductivity (TSC) and exoelectronic emission (TSEE) measurements is developed and applied to alpha -Al sub 2 O sub 3 material. In the scope to distinguish between bulk processes, for TL and TSC, and surfa...

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Veröffentlicht in:Journal of physics. D, Applied physics Applied physics, 2002-08, Vol.35 (15), p.1895-1902
Hauptverfasser: Berkane-Krachai, A, Iacconi, P, Bindi, R, Vinceller, S
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container_end_page 1902
container_issue 15
container_start_page 1895
container_title Journal of physics. D, Applied physics
container_volume 35
creator Berkane-Krachai, A
Iacconi, P
Bindi, R
Vinceller, S
description A theoretical model destined to analyse simultaneously thermally stimulated luminescence (TL), conductivity (TSC) and exoelectronic emission (TSEE) measurements is developed and applied to alpha -Al sub 2 O sub 3 material. In the scope to distinguish between bulk processes, for TL and TSC, and surface emission for TSEE, a multilayer model is adopted. It is also assumed that TSEE results from thermionic mechanism. The model allows the study of heating rate effect on TL, TSC and TSEE responses. It is experimentally established that response of approx =450 K TL peak decreases when heating rate increases. Simultaneously, TSC response remains constant whereas TSEE signal increases. The attenuation of TL response is explained by thermal quenching of F-centre luminescence and it is well described by the Mott-Seitz theory.
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title Analysis with a multilayer model of heating rate effect on thermally stimulated luminescence, conductivity and exoelectronic emission of alpha -Al sub 2 O sub 3
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