Earticle

초록

영어

This review surveys the physical origin of flux pinning in high-temperature superconductors (HTS), with a focus on REBCO coated conductors. We begin with the microscopic origin of Cooper pairing, contrasting conventional phonon-mediated coupling with the strong electronic correlations and antiferromagnetic spin fluctuations that are widely regarded as playing a central role in cuprate pairing, and then examine the thermodynamic limits imposed by temperature, magnetic field, and current density. Vortex formation and motion in type-II superconductors are described within Ginzburg-Landau phenomenology, clarifying how the coherence length, the penetration depth, and the Ginzburg-Landau parameter determine the vortex core structure and the stability of the vortex lattice. On this basis, artificial pinning centers are classified by dimensionality - 0D point defects, 1D nanorods, 2D planar defects such as stacking faults and twin boundaries, and 3D nanoparticles - and their reported pinning force densities are compared over a broad range of temperature and magnetic field. We further discuss the intrinsic electromagnetic anisotropy arising from the layered perovskite structure of REBCO, which makes the critical current density particularly sensitive to magnetic fields applied along the c-axis, and review hybrid defect-engineering strategies that combine anisotropic and isotropic pinning centers to reduce that angular dependence. Taken together, the results indicate that a multidimensional combination of defects, matched to the intended operating temperature, field strength, and field orientation, provides a practical design route for REBCO conductors in high-field applications.

목차

Abstract
1. 초전도 기술의 발전과 REBCO 고온 초전도체
2. 쿠퍼쌍의 형성과 붕괴
2.1. 쿠퍼쌍의 형성 원리
2.2. 쿠퍼쌍의 에너지 상태
2.3. 쿠퍼쌍 붕괴의 열역학적 임계 요인
3. 볼텍스의 형성과 이동
3.1. 자속선의 침투와 볼텍스 형성
3.2. 자속선의 이동
3.3. 자속선의 고정
4. 결함별 특징과 설계
4.1. 결함별 자속선 고정 특성
4.2. 결함별 성능 연구 결과
4.3. REBCO의 구조적 이방성과 취약점
4.4. 하이브리드 결함의 형성 메커니즘
4.5. 하이브리드 피닝 센터의 성능
5. 결론
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Seung Chul Oh [ Seoul National University of Science and Technology, Seoul, Korea ]
• Jung-Woo Lee [ Seoul National University of Science and Technology, Seoul, Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537