A New Photorefractive Material KNSBN; Co,
SHANDONG UNIV JINAN (CHINA) INST OF CRYSTAL MATERIALS
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Potassium sodium strontium barium niobate KNSBN has been developed in our country for the first time. It is a new ferroelectric with A-sites thoroughly occupied by K, Na, Sr2 and Ba2 ions. Comparing to BaTiO3, KNSBN crystals have no phase transition at room temperature, but have large hardness coefficient and 180 deg ferroelectric domains that are easy to be polarized. KNSBN will be one of the most prospective photorefractive materials that can be used in holographic storage, image amplification and optical phase conjugation. The purpose of this paper is to describe the crystal growth and photorefractive properties of KNSBNCo.