Izvorni znanstveni članak

Kinetic behaviour of F-centres under thermal stress

Swarupa Bandyopadhyay ; Department of Physics, Jadavpur University, Kolkata 700 032, India
Tanusri Ghosh ; Department of Physics, Jadavpur University, Kolkata 700 032, India
Kamal Kanti Ray ; Department of Physics, Jadavpur University, Kolkata 700 032, India
Satyajit Kar ; Department of Physics, Jadavpur University, Kolkata 700 032, India
Anjan Kumar Lahiri ; Department of Physics, Jadavpur University, Kolkata 700 032, India
Ajay Kumar Maiti ; Bidhannagar College (Govt. of West Bengal), Salt Lake City, Kolkata 700 064, India
Kushalendu Goswami ; Department of Physics, Jadavpur University, Kolkata 700 032, India

Sažetak

The migration of colour clouds after the electron injection in pure and doped KCl and KBr alkali halides under thermal and field stresses is studied with an anode contact of spherical geometry. The diffusion coefficient of the colour clouds has been obtained using a derived analytical expression and the experimental data, and the activation energy of the colour centre was estimated. The dissociation energy values under thermal and field stresses for doped crystals are deduced through the mobility transport equation. The results indicate the effect of doping in an otherwise pure counterpart of the same crystals.

Ključne riječi

alkali halides with doping-induced defects; diffusion coefficient; thermal stress; mobility of F-centres; activation energy; space-charge limited conduction

Hrčak ID:

302560

URI

https://hrcak.srce.hr/302560

Datum izdavanja:

1.3.2009.

Podaci na drugim jezicima: hrvatski

Posjeta: 157 *