Charge transfers between traps in undoped Bi12GeO20 (BGO) crystals have been
investigated so as to complete our previous studies concerning the mechanism of the …

A close correlation between thermally stimulated conductivity and thermally bleached
photochromism experiments allows us to propose a charge transfer mechanism: free …

We report on the first observation to our knowledge of the photorefractive effect due to hole
photoconduction in Bi 12 GeO 20 (BGO) crystals. In cubic crystals such as BGO, the study of …

A systematic investigation of deep levels in undoped and doped (Fe, Fe/V, excess of Bi)
single crystals of Bi12 GeO20 (BGO) has been performed by photoinduced current transient …

The temperature dependence of the photorefractive effect in undoped and Ga-doped Bi 12
GeO 20 (BGO) crystals was measured over the temperature range from 40 to 300 K. From …

Reliable and reproducible results on Bi 12 GeO 20 (BGO) crystals depend on the thermal
and optical history of the samples. It is then necessary to find well defined state of the …

When subjected to measurements of temperature‐dependent dark conductivity and
thermally stimulated currents, undoped and lightly doped Bi12GeO20 (BGO) and Bi12SiO20 …

The photochromine effect in Bi 12 GeO 20 doped with Cu was investigated. The optical
absorption of coloured and bleached crystals divides into well separated bands and lines …

Optical absorption and ESR spectra of Bi 12 GeO 20 doped with Cr were measured before
and after illumination with visible light. It was found that Cr 4+ ions in tetrahedral position are …

Data from measurements of optical absorption, photoconductivity, dark conductivity,
thermally stimulated conductivity (TSC), and thermoluminescence (TL) on samples of …