원문정보
초록
영어
The improvement of critical current properties of REBa2Cu3O7-x (REBCO) coated conductors by introducing artificial pinning centers (APCs) is examined with respect to the field-angle anisotropy, high-field performance and relaxation property with time. Nano-rods along the -axis introduced by PLD method and isotropic nano-particles introduced by TFA-MOD method are treated. The theoretical analysis is also shown to understand the effect of APCs quantitatively. The effects of superconducting layer thickness that influences the high-field performance and relaxation property are also discussed. It is shown that the upper critical field, which is another important factor to determine the high-field property, can be improved by introduction of APCs through electron scattering at interfaces with the superconducting matrix. The optimum critical current property can be obtained by properly designing the morphology and number density of APCs and the superconducting layer thickness.
목차
1. INTRODUCTION
2. IMPROVEMENT OF PINNING CHARACTERISTICS BY APCs
2.1. Field-angle anisotropy
2.2. High field property
2.3. Relaxation property
2.4. Improvements by thick superconducting layer
3. THEORETICAL APPROACH AND DISCUSSION
3.1. Field-angle anisotropy
3.2. High field property
3.3. Relaxation property
3.4. Effect of superconducting layer thickness
4. CONCLUSION
APPENDIX
REFERENCES