Flux Pinning Characteristics of ${\rm Sm}_{1+x}{\rm Ba}_{2-x}{\rm Cu}_{3}{\rm O}_{y}$ Films With the Additional $c$-Axis Correlated Pinning Centers
Flux Pinning Characteristics of ${\rm Sm}_{1+x}{\rm Ba}_{2-x}{\rm Cu}_{3}{\rm O}_{y}$ Films With the Additional $c$-Axis Correlated Pinning Centers
复制标题
具有附加 ${ m Sm}_{1 x}{ m Ba}_{2-x}{ m Cu}_{3}{ m O}_{y}$ 薄膜的磁通钉扎特性
DOI：
10.1109/tasc.2009.2018456
复制
发表时间：
2009
影响因子：
1.8
通讯作者：
R. Kita
中科院分区：
文献类型：
--
作者：
T. Ozaki;Y. Yoshida;Y. Ichino;T. Harada;Y. Takai;K. Matsumoto;A. Ichinose;S. Horii;M. Mukaida;R. Kita
已知由REBa 2Cu 3 Oy（REBCO）膜内的自组织BaZrO 3（BZO）纳米棒组成的柱状缺陷作为c轴相关钉扎中心是有吸引力的。另一方面，我们已经制备了高Jc Sm 1 + xBa 2-xCu 3 Oy（SmBCO）薄膜，包括纳米级的低Tc相，通过使用低温生长（LTG）技术。在这项研究中，BZO纳米棒被添加到LTG-SmBCO膜的磁通钉扎的进一步增强。此外，我们还沉积了一个传统的PLD-SmBCO薄膜包括BZO纳米棒和讨论之间的LTG和PLD-SmBCO薄膜的磁通钉扎性能和微观结构的差异。在BZO掺杂的PLD-SmBCO薄膜的横截面透射电子显微镜（TEM）图像中，我们可以看到自组织的BZO纳米棒直径约为10 nm，沿着薄膜的c轴延伸。相比之下，在BZO掺杂的LTG-SmBCO薄膜中，具有较小直径的高密度BZO纳米棒倾向于短柱，并与c轴方向倾斜。这些事实可以归因于吸附原子的表面扩散长度的抑制和/或由于在BZO掺杂LTG-SmBCO薄膜的生长过程中的低衬底温度的成核频率的增加。此外，我们得出的结论是，BZO掺杂PLD-和LTG-SmBCO薄膜的超导性能之间的差异可能是由于BZO纳米棒的数量密度的差异，产生晶格应变周围。
It is known that columnar defects comprised of self-organized BaZrO3 (BZO) nanorods within REBa2Cu3Oy (REBCO) films are attractive as c-axis correlated pinning centers. On the other hand, we have fabricated high-Jc Sm1+xBa2-xCu3Oy (SmBCO) films including nanosized low-Tc phases by using the low-temperature growth (LTG) technique. In this study, BZO nanorods were added to the LTG-SmBCO film for a further enhancement of the magnetic flux pinning. Additionally, we also deposited a conventional PLD-SmBCO film including BZO nanorods and discussed differences of the flux pinning properties and microstructures between LTG- and PLD-SmBCO films. In a cross-sectional transmission electron microscopy (TEM) image of the BZO doped PLD-SmBCO film, we could see the self-organized BZO nanorods were about 10 nm in diameter, extending along the c-axis of the film. In contrast, in the BZO doped LTG-SmBCO film, the high density BZO nanorods with smaller diameters tended to be short columns and tilted against the c-axis direction. These facts can be attributed to a suppression of the surface diffusion length of adatoms and/or an increase of nucleation frequency due to the low substrate temperature during the growth of the BZO doped LTG-SmBCO film. Furthermore, we concluded that differences of superconducting properties between the BZO doped PLD- and LTG-SmBCO films might be attributed to the difference in the number density of BZO nanorods which generated lattice strain around them.
不同工艺制备的Sm_<1x>B_<2-x>Cu_3O_y薄膜中的位错密度和临界电流密度
DOI：
--
发表时间：
2006
期刊：
Jpn.J.Appl.Phys. Vol.45
影响因子：
--
作者：
M.Miura et al.;その他8名
通讯作者：
その他8名