Effect of mixed pinning landscapes produced by 6 MeV oxygen irradiation on the resulting critical current densities Jc in 1.3 µm thick GdBa 2 Cu 3 O 7- d coated conductors grown by co-evaporation

ABSTRACTChanges in critical current properties depending on growth temperature (Ts) were clarified for Ba-Nb-O-doped YBa2Cu3Oy (Y123) films deposited by YAG- and excimer-PLD. Due to the introduction of Ba-Nb-O-nanorods, a vortex-Bose-glass-like behavior emerged as irreversibility lines and in-field critical current densities (Jcs) were improved. Crossover magnetic fields (Bcr) and in-field Jcs increased with the increase in Ts for the Y123 films with nanorods. These Ts-dependent critical current properties were attributable to the changes in morphology of the nanorods with Ts and were independent of laser source in PLD apparatuses. For the fabrication of RE123 coated conductors containing nanorods, optimization of Ts with taking both materials of RE123 matrix and nanorod into account is necessary to achieve higher in-field Jc.

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Inductive Measurement of the Magnetic-Field Angular Dependent Critical Current Densities and n-values in High-Temperature Superconducting Thin Films and Coated Conductors using Third-Harmonic Voltages

TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) ◽

10.2221/jcsj.49.494 ◽

2014 ◽

Vol 49 (9) ◽

pp. 494-499

Author(s):

Hirofumi YAMASAKI ◽

Mitsuho FURUSE

Keyword(s):

Magnetic Field ◽

Thin Films ◽

High Temperature ◽

Critical Current ◽

Coated Conductors ◽

Superconducting Thin Films ◽

Third Harmonic ◽

Current Densities ◽

Inductive Measurement ◽

The Magnetic Field

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Engineered Microstructures and Transport Properties in YBCO Coated Conductors

MRS Proceedings ◽

10.1557/proc-689-e9.6 ◽

2001 ◽

Vol 689 ◽

Cited By ~ 2

Author(s):

T. G. Holesinger ◽

B. J. Gibbons ◽

J. Y. Coulter ◽

S. R. Foltyn ◽

J. R. Groves ◽

...

Keyword(s):

Transport Properties ◽

Buffer Layer ◽

Critical Current ◽

Film Structure ◽

Coated Conductors ◽

Superconducting Film ◽

Coated Conductor ◽

Layer Material ◽

Current Densities ◽

Ybco Coated Conductors

ABSTRACTEach process used to deposit or make the bi-axially textured template, buffer layer(s), and the superconductor in a coated conductor creates interfaces along which defects or interfacial reactions may result. These defects can be additive and propagate through the entire film structure to affect the growth and properties of the superconducting film. Defects within the films and their corresponding transport properties have been correlated with the differences in the thickness of the underlying buffer layer material. This knowledge can be used to control and engineer the structure of the coated conductor to maximize critical current densities.

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