Effect of induced shielding current transmission in longitudinal direction on levitation force of melt grown single-domain YBa_2Cu_3O_(7-x) cylindrical superconductor  

作　　者：R. Nicolsky R. de Andrade Jr 

机构地区：[1]LASUP-DEE, UFRJ Ilha do Fundao, Cx.P.68515 21945-970 Rio de Janeiro, RJ, Brasil Correspondence should be addressed to Yang Wanmin ,LASUP-DEE, UFRJ Ilha do Fundao, Cx.P.68515 21945-970 Rio de Janeiro, RJ, Brasil Correspondence should be addressed to Yang Wanmin

出　　处：《Science China(Physics,Mechanics & Astronomy)》2004年第2期146-153,共8页中国科学：物理学、力学、天文学（英文版）

摘　　要：A novel layer deletion method is used to experimentally investigate the effect of induced shielding current transmission (ISCT) in the longitudinal direction on the levitation force of a single-domain YBa2Cu3O7?x (YBCO) cylindrical superconductor (?30×7 mm). In the experiment the sample was gradually sliced into two equal sheets, at the middle height along a diameter with 5 mm every step. The experimental results show that the levitation force is closely related with the ISCT in the longitudinal direction. Any layer deletion, even a small piece of layer deletion can reduce the levitation force of the sample. After the whole layer was deleted the levitation force can diminish about 50%. It is also found that the levitation force is directly proportional to the effective factor of surface area, which is equal to the top surface area divided by the total surface area parallel to the top surface of the sample.A novel layer deletion method is used to experimentally investigate the effect of induced shielding current transmission (ISCT) in the longitudinal direction on the levitation force of a single-domain YBa2Cu3O7-x (YBCO) cylindrical superconductor (f30? mm). In the experiment the sample was gradually sliced into two equal sheets, at the middle height along a diameter with 5 mm every step. The experimental results show that the levitation force is closely related with the ISCT in the longitudinal direction. Any layer deletion, even a small piece of layer deletion can reduce the levitation force of the sample. After the whole layer was deleted the levitation force can diminish about 50%. It is also found that the levitation force is directly proportional to the effective factor of surface area, which is equal to the top surface area divided by the total surface area parallel to the top surface of the sample.

关 键 词：MELT growth  single domain YBCO  LEVITATION force  INDUCED current distribution. 

分 类 号：O511[理学—低温物理]