Characteristics of ErBa2Cu3O7−δ films with BaWO4 doping
Characteristics of ErBa2Cu3O7−δ films with BaWO4 doping
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BaWO4 掺杂的 ErBa2Cu3O7−δ 薄膜的特性
DOI：
10.1016/j.physc.2007.04.275
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发表时间：
2007
影响因子：
1.7
通讯作者：
N. Mori
中科院分区：
文献类型：
--
作者：
Y. Shingai;T. Numasawa;M. Mukaida;R. Teranishi;R. Kita;A. Ichinose;S. Horii;Y. Yoshida;K. Matsumoto;S. Awaji;K. Watanabe;A. Saito;K. Yamada;N. Mori
制备了 BaWO{sub 4} (BWO) 掺杂的 ErBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (Er-123) (BWO + Er-123) 薄膜并评估了其超导性能。我们讨论了 Er-123 薄膜中 BWO 掺杂对其结晶度和超导性能的影响。生长的 BWO + Er-123 薄膜是面内对齐且 c 轴取向的。我们通过 XRD 面内旋转测量（{phi}-扫描）来表征薄膜的面内结晶度。随着 BWO 掺杂的增加，生长的 BWO + Er-123 薄膜的 {phi} 扫描图案 ({delta}{phi}) 的半峰全宽变得更宽。 2.0wt％BWO+Er-123膜的临界温度(T{subC0})约为90.5K。从该结果可以确认，BWO+Er-123膜具有与纯Er-123膜一样高的T{subC}。与纯 Er-123 薄膜相比，BWO + Er-123 薄膜的表面电阻 (R{sub S}) 有所降低。在 77 K 下评估了临界电流密度 (J{sub C}) 和外加磁场 (J{sub C}-B) 之间的关系以及生长的 2.0 wt% BWO + Er-123 薄膜的 J{sub C} 的磁场角度依赖性。结果证实，与纯 Er-123 薄膜相比，BWO 掺杂使 Er-123 薄膜在磁场中的 J{sub C} 降低。然而，还证实了 2.0 wt% BWO + Er-123 薄膜沿 Er-123 薄膜的 c 轴具有弱钉扎中心。从横截面透射电子显微镜 (TEM) 图像的结果来看，在 2.0 wt% BWO + Er-123 薄膜中观察到一些棒状结构。棒的直径约为20 nm。这些棒沿着 Er-123 薄膜的 c 轴从基底生长到薄膜表面。
BaWO{sub 4} (BWO) doped ErBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (Er-123) (BWO + Er-123) films are fabricated and their superconducting properties are evaluated. We discuss the effect of BWO doping into Er-123 films on their crystallinity and superconducting properties. The grown BWO + Er-123 films were in-plane aligned and c-axis oriented. We characterize in-plane crystallinity of the films by XRD in-plane rotation measurement ({phi}-scan). The full width at a half maximum of the {phi}-scan pattern ({delta}{phi}) of the grown BWO + Er-123 films became wider as increasing BWO doping. The critical temperature (T{sub C0}) of 2.0 wt% BWO + Er-123 films was about 90.5 K. From this result, it was confirmed that the BWO + Er-123 films had as high T{sub C} as pure Er-123 films. Surface resistance (R{sub S}) of the BWO + Er-123 films was degraded comparing to that of a pure Er-123 film. The relationships between critical current density (J{sub C}) and applied magnetic field (J{sub C}-B) and the magnetic field angular dependence of J{sub C} of the grown 2.0 wt% BWO + Er-123 film were evaluated at 77 K. As a result, it is confirmed that the J{sub C} of the Er-123 films in magnetic fields decreased by the BWO doping comparing to that of the pure Er-123 film. However, it was also confirmed that the 2.0 wt% BWO + Er-123 film had weak pining centers along the c-axis of Er-123 films. From the result of a cross-sectional transmission electron microscope (TEM) image, some rod structures were observed in the 2.0 wt% BWO + Er-123 films. The diameter of the rod was about 20 nm. These rods grew along the c-axis of Er-123 films from the substrate to the surface of the film.
直流磁场中高温超导薄膜表面电阻与临界电流密度的关系
DOI：
--
发表时间：
2005
期刊：
IEEE Trans.Appl.Supercond. 15・2
影响因子：
--
作者：
A.Saito;M.Shirakawa;K.Kitamura;Y.Noguchi;M.Mukaida;S.Ohshima;H.Yamasaki;Y.Nakagawa
通讯作者：
Y.Nakagawa
使用双缓冲层a轴取向ErBa_2Cu_3O_<7-δ>薄膜的生长和表征
DOI：
--
发表时间：
2005
期刊：
Physica C 426-431
影响因子：
--
作者：
Y.Shingai;M.Mukaida;T.Ohazama;A.Ichinose;S.Horii;Y.Yoshida;K.Matsumoto;K.Koike;F.Hirose;A.Saito;S.Ohshima
通讯作者：
S.Ohshima