DOI QR코드

DOI QR Code

Superconducting Properties of (Sm/Y)-Ba-Cu-0 High Tc Composite Superconductors with CeO2 Additive by Zone-Melt Textured Growth

국부용융성장법으로 제조한 (Sm/Y)-Ba-Cu-0계 고온복합초전도체의 CeO2첨가에 따른 초전도특성

  • 김소정 (동해대학교 전기공학과)
  • Published : 2002.03.01

Abstract

(Sm/Y)-Ba-Cu-O system high Tc composite superconductors with/without $CeO_2$ additive were directionally grown by zone-melting process, haying large temperature gradient, In air atmosphere. Cylindrical green rods of $({Sm/y})_{1.8}Ba_{2.4}Cu_{3.4}O_x$ [(Sm/Y)1.8] composite oxides by cold isostatic pressing(CIP) method using rubber mold were fabricated. The microstructure and superconducting properties were investigated by XRD, SEM, TEM and SQUID magnetometer. The size of nonsuperconducting $({Sm/y})_2BaCuO_5$ inclusions of the melt-textured (Sm/Y)1.8 sample with CeO$_2$ additive were remarkably reduced and uniformly distributed within the superconducting (Sm/Y)1.8 matrix. Both samples, with/without $CeO_2$ additive, showed an onset Tc $\geq$ 90 K and sharp superconducting transition. The critical current density Jc value of the $CeO_2$ addictive were $1{\times}10^5A/\textrm{cm}^2$ in 77 K, 0 Tesla.

References

  1. 전기전자재료학회지 v.11 no.10 Y-Ba-Cu-O 초전도체의 제조공정기술 성태현;한승호;한상철
  2. Appl. Phys. Lett. v.57 no.14 Microstructure and critical current density of zone melt textured YBa2 Cu3 O6-x P. McGinn;W. Chen;N. Zhu;M. Lanagan;U. Balachandran https://doi.org/10.1063/1.104125
  3. J. Appl. Phys. v.68 no.1 Transport critical current density and microstructure in extruded YBa2Cu3 O7-x wires processed by zone melting Donglu Shi;H. Krishnan;J. M. Hong;D. Miller https://doi.org/10.1063/1.347122
  4. Supercond. Sci. Technol. v.9 Melt-processed light rare earth element-Ba-Cu-O M. Murakami;N. Sakai;T. Higuchi;S. I. Yoo https://doi.org/10.1088/0953-2048/9/12/001
  5. Physica C v.298 Refinement of insulating Sm2BaCuO5 phase and its effect on Jc in melt processed SmBa2 Cu3 Oy system N. V. N. Viswanath;T. Rajasekharan https://doi.org/10.1016/S0921-4534(97)01820-0
  6. Appl. Phys. Lett. v.65 no.5 Melt processing for obtaining Nd-Ba₂Cu₃Oy superconductors with high Tc and large Jc S. I. Yoo;N. Sakai;H. Takaichi;M. Murakami https://doi.org/10.1063/1.112254
  7. Jpn. J. Appl. Phys. v.34 Fablication of single crystal of SmBa₂Cu₃Ox by the modified top-seed solution growth method in low oxygen partial pressure at-mosphere M. Nakamura;C. Krauns;Y. Shiohara https://doi.org/10.1143/JJAP.34.6031
  8. Jpn. J. Appl. Phys. v.34 Preparation and critical current density of melt mextured Y-Ba-Cu-O superconductor containing Fine Y2BaCuO5 inclusions C. J. Kim;H. W. Park;K. B. Kim;K. W. Lee;G. W. Hong https://doi.org/10.1143/JJAP.34.L671
  9. Supercond. Sci. Technol. v.9 Influence of CeO₂, BaCeO₃ or PtO₂ additionson the microstructure and the critical current density of melt processed YBCO samples M. P. Delamare;I. Monot;J. Wang;J. Provost;G. Desgardin https://doi.org/10.1088/0953-2048/9/7/005
  10. Physica C v.281 Effects of Ce-based additions during texturing of YBa2Cu3O7-x T. Meignan;A. Banerjee;J. Fultz;P. J. McGinn https://doi.org/10.1016/S0921-4534(97)00529-7
  11. 전기전자재료학회논문지 v.12 no.6 부유대역 용융응고법으로 제조된 YBa₂Cu₃Ox 산화물초전도체의 미세구조와 전기적 특성 노태형;송정환;장규철;한이섭;김소정;구본급;김호기
  12. 전기전자재료학회논문지 v.11 no.6 Ag와 Y2BaCuO5가 고온초전도체의 임계특성에 미치는 영향 이현수;강형곤;임성훈;한병성