Vortex pinning at low temperature under high magnetic field in SmBa2Cu3Oy superconducting films with high number density and small size of BaHfO3 nano-rods

被引：21

作者：

Miura, S. ^{[1
]}

Yoshida, Y. ^{[1
]}

Ichino, Y. ^{[1
]}

Tsuruta, A. ^{[1
]}

Matsumoto, K. ^{[2
]}

Ichinose, A. ^{[3
]}

Awaji, S. ^{[4
]}

机构：

[1] Nagoya Univ, Dept Energy Engn & Sci, Nagoya, Aichi 4648603, Japan

[2] Kyushu Inst Technol, Dept Mat Sci & Engn, Kitakyushu, Fukuoka 8048550, Japan

[3] Cent Res Inst Elect Power Ind, Elect Power Engn Res Lab, Yokosuka, Kanagawa 2400196, Japan

[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2015年 / 28卷 / 11期

基金：

日本学术振兴会; 日本科学技术振兴机构;

关键词：

BaHfO3; flux pinning; SmBa2Cu3Oy; thin film;

D O I：

10.1088/0953-2048/28/11/114006

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated 5.6 vol.% BaHfO3 (BHO)-doped SmBa2Cu3Oy (SmBCO) films at a low substrate temperature of 750 degrees C by using the low temperature growth (LTG) technique with a seed layer. Using the LTG technique, we can obtain a purely c-axis oriented SmBCO film even at low growth temperatures. The LTG technique also greatly increases the number density of BHO nanorods. The size and matching field of the BHO nanorods in the films were 5.4 nm and 9.9 T. Transport measurements were carried out, and a high irreversibility field (B-irr) and strong flux pinning force density (F-p) were obtained. The B-irr was 15.1 T at 77 K for B//c. The maximum F-p of 407 GN m(-3) in 10 T at 40 K and 770 GN m(-3) from 9 to 17 T at 20 K have been measured. We believe that the LTG technique can be considered as important for improving of flux pinning performance in BaMO3 (BMO: M = Zr, Sn and Hf)-doped SmBCO coated conductors.

引用

页数：6

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