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- W2014144655 abstract "The internal polarization characteristics of photoferroelectric barium titanate (BaTiO3) monocrystal have been investigated in detail. The polarization state in the crystal has been induced by the simultaneous application of a d.c. field and an illumination of an appropriate radiation for a known polarizing time. It has been found that the persistence and the magnitude of polarization depend on the polarization conditions. Therefore, the crystal has been polarized by varying the polarizing field, polarizing intensity, polarizing duration, and wavelengths of illumination. Soon after the polarization was terminated, the photodepolarization current decay characteristics of the polarized sample have been studied by reilluminating the crystal. The depolarization current is found to decay fast in the initial few minutes, but the decay rate becomes slower thereafter. This results in the retention of a volume polarization in the crystal, and depending on the polarization conditions, the current can persist for several hours to weeks. The photodielectric properties of the crystal have been also studied. The characteristics of the polarized BaTiO3 crystal show that they can be utilized successfully in volume holographic recording, beam coupling devices with added gain, and in image storing and retrieval devices." @default.
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- W2014144655 date "1990-01-04" @default.
- W2014144655 modified "2023-09-23" @default.
- W2014144655 title "Persistent Internal Polarization Characteristics Of Photorefractive Barium Titanate Monocrystal" @default.
- W2014144655 doi "https://doi.org/10.1117/12.962144" @default.
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