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| Effect of induced shielding current transmission in longitudinal direction on levitation force of melt grown single-domain YBa_2Cu_3O_(7-x) cylindrical superconductor | |
| 作者姓名： | R. Nicolsky R. de Andrade Jr |
| 作者单位： | 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 |
| 基金项目： | 科技部资助项目，国家重点基础研究发展计划(973计划) |
| 摘 要： | YBa2Cu3O7-x (YBCO) bulk is one of the most important high temperature superconducting materials for magnetic levitation applications, because it has a high magnetic irreversibility field Hirr at liquid nitrogen temperature, and can grow into large grains. The levitation force of YBCO bulk is proportional to the critical current density (Jc) and grain radius (r)1], so higher Jc and r are appreciated for YBCO bulks to achieve higher levitation force. Now single-domain YBCO bulks up to s… |
Effect of induced shielding current transmission in longitudinal direction on levitation force of melt grown single-domain YBa2Cu3O7-x cylindrical superconductor |
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| R. Nicolsky,R. de Andrade Jr.Effect of induced shielding current transmission in longitudinal direction on levitation force of melt grown single-domain YBa_2Cu_3O_(7-x) cylindrical superconductor[J].Science in China(Physics Astronomy),2004,47(2). | |
| Authors: | YANG Wanmin ZHOU Lian FENG Yong ZHANG Pingxiang RNicolsky Rde Andrade Jr |
| Affiliation: | 1. Department of Physics, Shaanxi Normal University, Xi'an 710062, China;Northwest Institute for Nonferrous Metal Research, P.O. Box 51, Xi'an 710016, China;LASUP-DEE, UFRJ Ilha do Fundao, Cx.P.68515 21945-970 Rio de Janeiro, RJ, Brasil 2. Northwest Institute for Nonferrous Metal Research, P.O. Box 51, Xi'an 710016, China 3. LASUP-DEE, UFRJ Ilha do Fundao, Cx.P.68515 21945-970 Rio de Janeiro, RJ, Brasil |
| Abstract: | 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. |
| Keywords: | melt growth single domain YBCO levitation force induced current distribution |
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