中国物理B ›› 1996, Vol. 5 ›› Issue (10): 781-789.doi: 10.1088/1004-423X/5/10/008

• • 上一篇    

MAGNETIZATION CHARACTERISTICS OF YBaCuO BULK MATERIAL FABRICATED BY THE SEEDING TECHNIQUE

蔡传兵, 傅耀先, 孙越, 龚尚敏   

  1. Shanghai Institute of Metallurgy, Academia Sinica, Shanghai 200040, China
  • 收稿日期:1995-08-17 出版日期:1996-10-20 发布日期:1996-10-20
  • 基金资助:
    Project supported by the National Centre for Research and Development on Superconductivity of China.

MAGNETIZATION CHARACTERISTICS OF YBaCuO BULK MATERIAL FABRICATED BY THE SEEDING TECHNIQUE

CAI CHUAN-BING (蔡传兵), FU YAO-XIAN (傅耀先), SUN YUE (孙越), GONG SHANG-MING (龚尚敏)   

  1. Shanghai Institute of Metallurgy, Academia Sinica, Shanghai 200040, China
  • Received:1995-08-17 Online:1996-10-20 Published:1996-10-20
  • Supported by:
    Project supported by the National Centre for Research and Development on Superconductivity of China.

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摘要： YBaCuO (YBCO) bulk materials with large superconductive domains were fab-ricated using a small SmBa2Cu3Ox grain as the seed for growth, The capacities of strong flux pinning and well grain linking in the material have been shown in the investigations on magnetization loop end ac susceptibility. The strong flux pinning made it possible for the large YBCO bulk to capture a great dea. l of flux and keep the residual magnetism stable. The residual field intensity Hrem was shown to have a maximum of 0.125 T after the 0.5 T NdFeB magnetizing field was moved away. We did not find much decline of Hrem in a short time. The magnetized YBCO bulk pro-duced repulsive force upon another YBCO bulk as the permanent magnet did. We measured and calculated the force between two YBCO bulks. The theoretical result was in agreement with the experimental one by and large.

Abstract: YBaCuO (YBCO) bulk materials with large superconductive domains were fab-ricated using a small SmBa2Cu3Ox grain as the seed for growth, The capacities of strong flux pinning and well grain linking in the material have been shown in the investigations on magnetization loop end ac susceptibility. The strong flux pinning made it possible for the large YBCO bulk to capture a great dea. l of flux and keep the residual magnetism stable. The residual field intensity Hrem was shown to have a maximum of 0.125 T after the 0.5 T NdFeB magnetizing field was moved away. We did not find much decline of Hrem in a short time. The magnetized YBCO bulk pro-duced repulsive force upon another YBCO bulk as the permanent magnet did. We measured and calculated the force between two YBCO bulks. The theoretical result was in agreement with the experimental one by and large.

中图分类号:  (Magnetic properties including vortex structures and related phenomena)

  • 74.25.Ha
81.20.-n (Methods of materials synthesis and materials processing) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.30.Cr (Saturation moments and magnetic susceptibilities)