Effect of Nanorod Alignment on Flux Pinning State in BaHfO3 Doped SmBa2Cu3Oy Films
Effect of Nanorod Alignment on Flux Pinning State in BaHfO3 Doped SmBa2Cu3Oy Films
复制标题
纳米棒排列对 BaHfO3 掺杂 SmBa2Cu3Oy 薄膜中通量钉扎状态的影响
DOI：
10.1109/tasc.2016.2646838
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发表时间：
2017
影响因子：
1.8
通讯作者：
Kazuo Watanabe
中科院分区：
文献类型：
--
作者：
Yuji Tsuchiya;Shun Miura;Qianyu Xu;Yusuke Ichino;Yutaka Yoshida;Satoshi Awaji;Kazuo Watanabe
利用带旋转台的高场磁体研究了BaHfO(BHO)纳米棒掺杂SmBa2Cu3Oy(SmBCO)薄膜的微结构对磁通钉扎态的影响。具有取向纳米棒的薄膜表现出沿c轴方向的强烈磁通钉扎，这种磁通钉扎现象在强磁场下消失。这一行为对应于薄膜中玻色玻璃态的存在，这也得到了根据输运性质估算的激活能和液体-玻璃转变的临界指数的行为的支持。此外，用相关纳米棒的磁通钉扎模型和取向纳米棒和烟火纳米棒结构薄膜中的随机钉扎中心解释了磁通钉扎力的场依赖关系。证实了BHO掺杂的SmBCO薄膜中纳米棒的结构与钉扎性能之间的密切关系。
The effect of the microstructure on the flux pinning state in BaHfO3(BHO) nanorods doped SmBa2Cu3Oy(SmBCO) films was investigated using high field magnets with a rotator stage. Films with aligned nanorods showed the strong flux pining along c-axis, which disappears at high magnetic fields. This behavior corresponds to the existence of the Bose glass state in the film, which is also supported by the behaviors of the activation energy and the critical exponent of the liquid-glass transition estimated from the transport properties. Moreover, the field dependencies of the flux pinning force are explained by the flux pinning models for the correlated nanorods and the random pinning centers in the films with the aligned and the firework nanorods structures. The strong relationship is confirmed between the structure of the nanorods and the pinning properties in the BHO doped SmBCO films.