陶瓷YBa2Cu3O7-x中宏观超涡区的位移和湮灭
The displacement and annihilation of macroscopic regions with hypervortices in ceramic YBa2Cu3O7-x
摘要：
可控位移，湮灭，实验研究了YBa_2Cu_3 O_（7-x）颗粒陶瓷板中弱冻结磁场（FMF）宏观区域在输运电流作用下的位移和变化.结果表明，FMF低于陶瓷颗粒第一临界场（Hc_（1g））的区域在输运电流作用下发生位移，而在输运电流作用下，FMF低于第一临界场（Hc_（1g））的区域在输运电流作用下发生位移.与一个相对较弱的钉扎力的hypervortices是小于最大的实验可达到的洛伦兹力。讨论了输运电流的作用，输运电流不仅是洛伦兹力出现的条件之一，而且还作用于局部FMF的内部电流结构，进而影响其迁移率和大小.如果一个大于Hc 1g的局部场被冻结，实验产生的洛伦兹力小于颗粒混合状态下Abrikosov涡旋的钉扎力，并且具有FMF的区域没有位移。
英文摘要：
Features of the controllable displacement, annihilation, and transformation of macroscopic regions of a weak frozen magnetic field (FMF) have been experimentally studied in a plate of granulated ceramic YBa2Cu3O7-x under the action of the transport current flowing through it. It is shown that the displacement of regions with an FMF lower than the first critical field of the ceramic granules (Hc1g) is associated with a relatively weak pinning force of the hypervortices that is less than the maximum experimentally attainable Lorenz force. A discussion is presented of the role of the transport current that not only is one of the conditions for the appearance of the Lorenz force but also acts on the internal current structure of the local FMF, which in turn influences its mobility and magnitude. If a local field greater than Hc1g is frozen in, the experimentally produced Lorenz force is less than the pinning force of the Abrikosov vortices in the mixed state of the granules, and there is no displacement of the regions with an FMF.
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