Improvement of flux pinning performance at high magnetic fields in GdBa2Cu3Oy coated conductors with BHO nano-rods through enhancement of Bc2

被引：42

作者：

Matsushita, T. ^{[1
]}

Nagamizu, H. ^{[1
]}

Tanabe, K. ^{[1
]}

Kiuchi, M. ^{[1
]}

Otabe, E. S. ^{[1
]}

Tobita, H. ^{[2
]}

Yoshizumi, M. ^{[2
]}

Izumi, T. ^{[2
]}

Shiohara, Y. ^{[2
]}

Yokoe, D. ^{[3
]}

Kato, T. ^{[3
]}

Hirayama, T. ^{[3
]}

机构：

[1] Kyushu Inst Technol, Dept Comp Sci & Elect, Iizuka, Fukuoka 8208502, Japan

[2] Int Superconduct Technol Ctr, Superconduct Res Lab, Koto Ku, Tokyo 1350062, Japan

[3] Japan Fine Ceram Ctr, Ataka Ku, Nagoya, Aichi 4568587, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2012年 / 25卷 / 12期

关键词：

CRITICAL-CURRENT DENSITY; IRRADIATION;

D O I：

10.1088/0953-2048/25/12/125003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Addition of BaHfO3 (BHO) nano-rods as pinning centers into a GdBa2Cu3Oy (GdBCO) coated conductor dramatically improves the critical current properties in high magnetic fields. This is partly ascribed to the strong flux pinning of these pinning centers. In this paper it is reported that this improvement is mainly caused by unexpected enhancement of the upper critical field, B-c2. The mechanism of the enhancement of B-c2 is not yet clear, although the strain around the interface between the pinning center and the superconducting matrix or the interface itself may scatter electrons. This result suggests that the critical current property of REBa2Cu3Oy (RE: rare earth elements, REBCO) coated conductors could be designed not only by tailoring the microstructure of pinning centers but also by controlling the intrinsic superconducting property. Especially, the selection of pinning material and its content that determines B-c2 is expected to be a key problem for further improvement of the pinning performance at high magnetic fields.

引用

页数：9

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