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Single Crystals Sr14-xCaxCu24O41 Grown under Different Oxygen Pressures by Optical Floating-Zone Technique
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Single Crystals Sr14-xCaxCu24O41 Grown under Different Oxygen Pressures by Optical Floating-Zone Technique
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Special Foundation for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) (CUGL110236); National Natural Science Foundation of China (41104054, 61008054)

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    摘要:

    利用光學(xué)浮區(qū)法制備了自旋梯子化合物Sr14-xCaxCu24O41 (SCCO)系列單晶樣品，研究了氧氣壓對晶體生長的影響和制備條件對晶體性質(zhì)的影響程度。發(fā)現(xiàn)在常壓氧氣氛下可以制備出Ca含量x小于8的大塊高質(zhì)量的SCCO晶體，但更高Ca含量的樣品仍然必須在高壓氧氣氛下 (0.9 MPa)下進(jìn)行。采用XRD，EDX能譜和電阻率測量實驗手段對不同條件制備的SCCO單晶樣品進(jìn)行的分析測試表明，不同氧氣壓制備出的SCCO單晶樣品的性質(zhì)差別較小，但是高壓氧氣氛更有利于高Ca含量樣品的晶體生長

    Abstract:

    Spin ladder compounds Sr14-xCaxCu24O41 (SCCO) single crystals have been grown under different oxygen pressures by an optical floating-zone technique. The effects of oxygen pressure on the crystal growth and properties of SCCO were studied. The SCCO single crystals with x≤8 can be grown in a flowing oxygen atmosphere. But the growth of the SCCO compounds with higher Ca content (x>8) needs higher pressure (0.9 MPa). The single crystals were characterized by means of XRD, EDX and resistivity measurement. High pressure is in favor of forming of higher Ca-doped SCCO single crystals. SCCO single crystals grown under different oxygen pressures have almost the same quality

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王清波,周 翠,陶 前,許祝安. Single Crystals Sr14-xCaxCu24O41 Grown under Different Oxygen Pressures by Optical Floating-Zone Technique[J].稀有金屬材料與工程,2011,40(11):1897~1900.[Wang Qingbo, Zhou Cui, Tao Qian, Xu Zhu’an. Single Crystals Sr14-xCaxCu24O41 Grown under Different Oxygen Pressures by Optical Floating-Zone Technique[J]. Rare Metal Materials and Engineering,2011,40(11):1897~1900.]
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  • 收稿日期:2011-03-12
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