TY - JOUR
T1 - Microstructures of high-Tc superconducting films having artificial pinning centers
AU - Ichinose, Ataru
AU - Matsumoto, Kaname
AU - Mukaida, Masashi
AU - Yoshida, Yutaka
AU - Horii, Shigeru
AU - Akita, Shirabe
N1 - Funding Information:
Manuscript received October 5, 2004. This research was supported by CREST, JST. A. Ichinose and S. Akita are with Central Research Institute of Electric Power Industry, Yokosuka, Kanagawa 240-0196, Japan (e-mail: ai@criepi.denken.or.jp; akita@criepi.denken.or.jp). K. Matsumoto is with Kyoto University, Kyoto, Kyoto 606-8501, Japan (e-mail: matsu@hightc.mtl.kuoto-u.ac.jp). M. Mukaida is with Yamagata University, Yonezawa, Yamagata 992-8510, Japan (e-mail: mukaida@yz.yamagata-u.ac.jp). Y. Yoshida is with Nagoya University, Nagoya, Aichi, 464-8603, Japan (e-mail: yoshida@nuee.nagoya-u.ac.jp). S. Horii is with University of Tokyo, Bunkyo, Tokyo 113-8565, Japan (e-mail: tholy@mail.ecc.u-tokyo.ac.jp). Digital Object Identifier 10.1109/TASC.2005.849412
PY - 2005/6
Y1 - 2005/6
N2 - REBa2Cu3Oy (REBCO) is expected to be used in numerous applications, such as power transmission cables, high-field magnets and generators, due to the possibility of a high critical current density at 77 K under a high magnetic field. Biaxially textured REBCO superconducting tapes are developed to obtain high-Jc. However, the Jc - B characteristics of REBa2Cu3Oy films have a magnetic field angle dependency. When the magnetic field is applied parallel to the film surface, the reduction in Jc is not larger under a high magnetic field of 10 T. When the magnetic field is applied perpendicular to the film surface, the reduction in Jc is significantly large under a magnetic field of more than around 5 T at 77 K. From the viewpoint of realizing wide applications of high-Tc superconductors, it is important to improve the Jc - B characteristics of REBCO films under magnetic fields higher than 5 T applied perpendicular to the film surface. Our group focuses on artificial pinning centers (APCs) introduced into REBCO films. The Jc - B characteristics of certain films are improved by the introduction of APCs. The microstructures of these, films are investigated using transmission electron microscopy (TEM). We report on the microstructures of REBCO films with APCs.
AB - REBa2Cu3Oy (REBCO) is expected to be used in numerous applications, such as power transmission cables, high-field magnets and generators, due to the possibility of a high critical current density at 77 K under a high magnetic field. Biaxially textured REBCO superconducting tapes are developed to obtain high-Jc. However, the Jc - B characteristics of REBa2Cu3Oy films have a magnetic field angle dependency. When the magnetic field is applied parallel to the film surface, the reduction in Jc is not larger under a high magnetic field of 10 T. When the magnetic field is applied perpendicular to the film surface, the reduction in Jc is significantly large under a magnetic field of more than around 5 T at 77 K. From the viewpoint of realizing wide applications of high-Tc superconductors, it is important to improve the Jc - B characteristics of REBCO films under magnetic fields higher than 5 T applied perpendicular to the film surface. Our group focuses on artificial pinning centers (APCs) introduced into REBCO films. The Jc - B characteristics of certain films are improved by the introduction of APCs. The microstructures of these, films are investigated using transmission electron microscopy (TEM). We report on the microstructures of REBCO films with APCs.
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U2 - 10.1109/TASC.2005.849412
DO - 10.1109/TASC.2005.849412
M3 - Article
AN - SCOPUS:22144465810
SN - 1051-8223
VL - 15
SP - 3718
EP - 3721
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 2 PART III
ER -