Magnetic Field Angular Dependence of Critical Current in Y1-xSmxBa2Cu3Oy Coated Conductors with Nanoparticles Derived from the TFA-MOD Process

• Published in: Teion kōgaku Vol. 44; no. 5; p. 210
• Main Authors: MIURA, Masashi, KATO, Takeharu, YOSHIZUMI, Masateru, YAMADA, Yutaka, IZUMI, Teruo, HIRAYAMA, Tsukasa, SHIOHARA, Yuh
• Format: Journal Article
• Language: English
• Published: Tokyo Japan Science and Technology Agency 01.05.2009
• ISSN: 0389-2441; 1880-0408

Artificial pinning centers (APC) for trifluoroacetates-metal organic deposition (TFA-MOD) Y1-xSmxBa2Cu3Oy (YSmBCO) coated conductors were introduced to enhance Jc under the magnetic fields and improve the magnetic field angular dependence of Jc. The coated conductors showed high self-fields Jc values (Jcs.f.) of 3.8 MA/cm2 and a Jc minimum value of 0.53 MA/cm2 at 77 K and 1 T. Moreover, the coated conductors have isotropic Jc-B-θ properties with the ratio (Jc,min/Jc,max) of 0.91 (77K, B=1 T). From the results of microstructural observation, BaZrO3 (BZO) nanoparticles were uniformly dispersed in the films by introduction of Zr-salt into the YSmBCO metallic organic solution. The nanoparticles were dispersed uniformly not only along the lateral direction (B//ab) but also along the normal direction to the tape (B//c). It is believed that the uniform dispersion of BZO nanoparticles in TFA-MOD REBCO coated conductors may act as flux pinning centers to enhance the Jc independent from the angle of the applied magnetic fields.