This behaviour can be explained by the fact that antivortices (vortices) are created at the white (red) border of the Py layer as illustrated in Fig. 3(b,c). Indeed, incoming vortices first annihilate with antivortices before moving further into the area covered by the magnetic layer (...
Thus, the minimum at f = 0 is explained by the lack of vortices in the array at zero magnetic field. On the other hand, the minima f = 1 and f = 3 correspond to cases where the number of vortices per unit cell is an integer (equal f). In the cases of f being ...
perconductingdisc.Theyhelpthepenetrationofvorticesintothesample,therebydecreasethe samplemagnetizationandreduceitsuppercriticalfield.Eventhepresenceofweakdefectssplita giantvortexstate(usuallyappearinginacleandiscinthevicinityofthetransitiontoanormal state)intoanumberofvorticeswithsmallertopologicalcharges.Inadiscwith...
The critical fields in the staircase are all\ncalculated analytically and depend only on the connectivity of the ladder and\nthe area of the elementary plaquette. In particular the normal square ladder\ncontains no vortices at all until the flux per plaquette reaches 0.5/sqrt{3}\nflux quanta....
The emerging field of spintronics leverages electron spin and magnetization. This could enhance the storage capacity of computer hard drives and potentially play an important role in quantum computing's future. Superconductor-ferromagnet (SF) structures
Bottom:The ux distribution, Bz, in the YBCO sample seen by MOIof an area that includes the antidot structure.(Color online) Top: Sketch of the antidot arrange-the perpendicular arrays are guiding the ux rather thanpinning the vortices. Thus, the current ow outlined inFig. 1 should give ...
The growth of nanocomposites has demonstrated to be the path to pin vortices and reach high critical currents at high magnetic fields in coated conductors, especially for large magnet applications4,5,6,7,36,37. In CSD, most of the effort has been done on adding metalorganic salts to the pr...
Understanding the physics of vortices in these complex materials and controlling of the atomic structure of defects have made it possible to design their performance and achieve exceptional values of superconducting properties which enable their integration into devices. In order to improve performance and...
Nowadays, the main approach to increase Jc is the introduction of nanoscaled defects (artificial pinning centres) in the YBCO matrix to immobilize magnetic vortices8,9,10,11,12,13. The total pinning force, Fp=Jc×B, is enhanced by an increased number of elementary pinning sites of optimised ...
BECs can exhibit a number of unusual physical properties, such as superfluidity, vortices, and attractive interactions. The rotational measurement sensitivity of atomic matter wave interferometers per unit area typically far exceeds that of optical interferometers. Unfortunately, achieving BEC in atomic ...