Relationship between the magnetic field distribution and attractive force of single-domain YBCO bulk under different field cooling processes
Yang Wan-Min (杨万民)abc, Zhou Lian (周廉)b, Feng Yong (冯勇)b, Zhang Ping-Xiang (张平祥)b, R. Nicolskyc
a Department of Physics, Shaanxi Normal University, Xi'an 710062, China; b Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China; c LASUP-DEE, UFRJ Ilha do Fundao, Cx. P. 68515 21945-970 Rio de Janeiro, RJ, Brazil
Abstract The levitation forces under different field cooling states were measured at 77K by changing the field cooling distance Zfc between a YBCO bulk and a permanent magnet. It is found that the relationship between the absolute maximum attractive force (Zmaf) and the corresponding gap distance (Zmaf) to Fmaf can be well described by exponential laws as a function of Zfc, which allow us to predict these values according to Zfc. It is also found that the distance between the Z0fa (gap distance corresponding to the zero force) and Zmaf in the ascending process is a constant value, which is closely related to the constant reduction factor of the axial component of flux density along the axial line of the magnet if Zmaf-Z0fa is a constant value. These results are very interesting for fundamental research and helpful in practical designing and applications.
Received: 07 March 2003
Revised: 09 December 2003
Accepted manuscript online:
(Magnetic properties including vortex structures and related phenomena)
Fund: Project supported by the Ministry of Science and Technology of China and by the State Key Development Programme for Basic Research of China (Grant No NKBRSF-G19990606).
Cite this article:
Yang Wan-Min (杨万民), Zhou Lian (周廉), Feng Yong (冯勇), Zhang Ping-Xiang (张平祥), R. Nicolsky Relationship between the magnetic field distribution and attractive force of single-domain YBCO bulk under different field cooling processes 2004 Chinese Physics 13 1353
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
