Title :
Flux Pinning Properties of BHO Pinning Centers at High Magnetic Fields in GdBCO Coated Conductors
Author :
Matsushita, Teruo ; Nagamizu, H. ; Tanabe, Kazuki ; Kiuchi, Masaru ; Otabe, Edmund Soji ; Tobita, Hiromi ; Yoshizumi, M. ; Izumi, T. ; Shiohara, Y. ; Yokoe, D. ; Kato, Toshihiko ; Hirayama, Takatsugu
Author_Institution :
Fac. of Comput. Sci. & Syst. Eng., Kyushu Inst. of Technol., Iizuka, Japan
Abstract :
It has been recognized that BaHfO3 (BHO) pinning centers introduced into GdBa2Cu3O6 +y (GdBCO) coated conductors show high pinning performance at high magnetic fields. This pinning property was ascribed to the strong pinning force of the BHO nano-rods and also to the improved upper critical field, Bc2, probably due to the scattering of electrons by the interface between the nano-rods and the superconducting matrix. In this paper the critical current properties of GdBCO coated conductors with different amounts of BHO nano-rods are theoretically investigated. It is found that BHO nano-rods are promising to improve the high field performance of GdBCO coated conductors.
Keywords :
barium compounds; critical current density (superconductivity); flux pinning; gadolinium compounds; high-temperature superconductors; nanorods; superconducting critical field; BHO nanorods; BHO pinning centers; BaHfO3; BaHfO3 pinning centers; GdBCO coated conductors; GdBa2Cu3O6-BaHfO3; critical current properties; electron scattering; flux pinning property; magnetic fields; superconducting matrix; upper critical field; Conductors; Creep; Critical current density; Degradation; Magnetic flux; Magnetic properties; Superconducting magnets; $hbox{BaHfO}_{3}$ (BHO) nano-rods; $hbox{GdBa}_{2}hbox{Cu}_{3}hbox{O}_{6 + y}$; flux pinning; upper critical field;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2012.2231458
