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Electrically active defects in BiSiO crystals undoped and doped with Cr and Mn ions
Authors:T V Panchenko  L M Karpova
Institution:(1) Dnepropetrovsk State University, 320625 Dnepropetrovsk, Ukraine
Abstract:The influence of doping of Bi12SiO20 (BSO) with chromium and manganese ions on the thermal depolarization currents (TDCs) is investigated. Measurements are performed in the temperature interval 300–800 K as the preliminary polarization temperature is varied in the range T p=300–523 K. It is shown that doping significantly alters the structure of the TDC spectra. The Cr and Mn ions produce a set of new peaks over the entire investigated temperature range. The thermal activation energies are 0.85–1.98 eV (BSO:Cr) and 0.58–1.72 eV (BSO:Mn). Another consequence of doping is an increase in the amplitudes of the peaks and the charge accumulated during preliminary polarization. Fiz. Tverd. Tela (St. Petersburg) 40, 472–474 (March 1998)
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