| Defects in La_2CuO_4 and La_(1.86)Sr_(0.14)CuO_4 single crystals |
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| 作者单位： | YANG Wei，JIA Liansuo，CHEN Xiaolong，and WANG Cong Center of Materials Physics and Chemistry，School of Sciences，Beihang University，Beijing 100083，China Institute of Physics and Center for Condensed Matter Physics，Chinese Academy of Sciences，Beijing 100080，China |
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| 摘 要： |
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Defects in La_2CuO_4 and La_(1.86)Sr_(0.14)CuO_4 single crystals |
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| Authors: | YANG Wei JIA Liansuo CHEN Xiaolong and WANG Cong Center of Materials Physics and Chemistry School of Sciences Beihang University Beijing China Institute of Physics and Center for Condensed Matter Physics Chinese Academy of Sciences Beijing China |
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| Institution: | YANG Wei,JIA Liansuo,CHEN Xiaolong,and WANG Cong Center of Materials Physics and Chemistry,School of Sciences,Beihang University,Beijing 100083,China Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080,China |
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| Abstract: | La2CuO4 and La1.86Sr0.14CuO4 single crystals were obtained by traveling solvent floating zone method. There were five kinds of defects in these single crystals: cracks, inclusions, gas bubbles, unhomogeneous distribution of Sr2+, and substructures. CH3COOH aqueous solution was used to etch these single crystals, and the etch-pit density was calculated. The formation mechanism of these defects was discussed. It is suggested that the good preparation of raw materials and the stringent growth conditions play an important role in growing high quality single crystals. |
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| Keywords: | defects TSFZ method etch-pit density |
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