Physics – Condensed Matter – Superconductivity
Scientific paper
2009-03-12
Physics
Condensed Matter
Superconductivity
To be published in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.79.144501
We study the vortex structure in a Pb film deposited on top of a periodic array of ferromagnetic square microrings by combining two high resolution imaging techniques: Bitter decoration and scanning Hall probe microscopy (SHPM). The periodicity and strength of the magnetic pinning potential generated by the square microrings are controlled by the magnetic history of the template. When the square rings are in the magnetized dipolar state, known as the onion state, the strong stray field generated at the domain walls prevents the decoration of vortices. SHPM images show that the stray field generated by the dipoles is much stronger than the vortex field in agreement with the results of simulations. Real space vortex imaging has revealed that, in the onion state, the corners of the square rings act as effective pinning centers for vortices.
Fritzsche J.
Keyser K. de
Kramer R. B. G.
Menghini Mariela
Metlushko Vitali
No associations
LandOfFree
Direct visualization of magnetic vortex pinning in superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Direct visualization of magnetic vortex pinning in superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct visualization of magnetic vortex pinning in superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-36403