Earticle

초록

영어

We investigated the flux pinning properties of GdBa2Cu3O7-x (GdBCO) superconducting films grown on a LaFeO3 (LFO) buffer layer forming a bilayer structure. LFO films with different thicknesses and GdBCO thin films were all prepared by using a pulsed laser deposition technique. The magnetization measurements revealed that the critical current density of the GdBCO bilayer structure with the LFO buffer layer increased in low magnetic field regions compared to pure GdBCO films. Notably, the variation in critical current density and the position of the maximum pinning force density did not exhibit a simple dependence on the LFO buffer layer thickness. Dew-Hughes’ model fitting confirmed that normal surface pinning is the primary pinning mechanism for both the thinnest and the thickest LFO films. However, for intermediate LFO buffer layer thickness, additional pinning mechanisms beyond normal surface pinning were identified, likely due to the defects from misoriented crystallites, as indicated by the close correlation between the fitting exponent and the grain size of the bilayer structure.

목차

Abstract
1. INTRODUCTION
2. EXPERIMENT
3. RESULTS AND DISCUSSIONS
4. CONCLUSION
ACKNOWLEDGMENTS
REFERENCES

키워드

저자

• Han Seok Park [ Department of Physics, Chungbuk National University, Cheongju 28644, Korea ]
• Byeongwon Kang [ Department of Physics, Chungbuk National University, Cheongju 28644, 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