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首页> 外文期刊>Journal of Crystal Growth >A new method for growing Ba_1-xK_xBiO_3 single crystals and investigtion of their properties
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A new method for growing Ba_1-xK_xBiO_3 single crystals and investigtion of their properties

机译：生长Ba_1-xK_xBiO_3单晶的新方法及其性能研究

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摘要

Large single crtals of the copper-free Ba_1-xK_xBiO_3 (BKBO) superconductor have been successfully grown using modified method fo electrochemical deposition. For the first time we employed the method of growth where a BaBiO_3 sile crystal palte was used as a seed. A BKBO layer wih (1 0 0) orientation and ～1 mm thick grown on the susbgtrate was cut off and thereafter used as a secondary seed. We used a dynamic method, i.e., a crystal hold3er wih reciprocating motion to homogenize he poassium ditributon over the crystal volume. The maximm volume of the as-grown crystals reached ～2 cm~3 with the FWHM of the Bragg reflection curves not exceeding 1 deg. The lattice structure of the Abrikosov vortices as well as the character of defects fo the Ba_0.6K_0.4BiO_3 single crystal, cuased by the growth technqiue, has been studied by smal-angle neutron scattering. From SQUID magnetisation measurements, the growth-induced anisotropy of hysteresis loops and pinning force of the seocnd-order superconducor are reported.
机译：使用电化学沉积的改进方法已成功地生长了大的单个无铜Ba_1-xK_xBiO_3（BKBO）超导体。我们首次采用了生长方法，其中使用BaBiO_3硅酸盐晶体调色板作为种子。切下在底物上生长的（1 0 0）取向且厚约1mm的BKBO层，然后用作次要种子。我们使用了一种动态方法，即往复运动的晶体保持器，以使晶体中的钾分布均匀。所生长晶体的最大体积达到〜2 cm〜3，布拉格反射曲线的FWHM不超过1度。通过小角度中子散射研究了Abrikosov涡旋的晶格结构以及由于生长技术引起的Ba_0.6K_0.4BiO_3单晶的缺陷特征。根据SQUID磁化强度的测量，报告了磁滞回线的生长引起的各向异性和第二阶超导体的钉扎力。

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