Coupled domain structures in superconductor/ferromagnet Nb-Fe/garnet bilayers
BUZDIN, Alexandre I.
Institut universitaire de France [IUF]
Centre de physique moléculaire optique et hertzienne [CPMOH]
< Reduce
Institut universitaire de France [IUF]
Centre de physique moléculaire optique et hertzienne [CPMOH]
Language
en
Article de revue
This item was published in
Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2010-09-13, vol. 82, n° 10, p. 100502 (1-4)
American Physical Society
English Abstract
We investigate the magnetic structure in a superconducting Nb and ferromagnetic garnet hybrid film. Direct magneto-optical observations reveal a strong interaction between the superconducting vortices in Nb and the magnetic ...Read more >
We investigate the magnetic structure in a superconducting Nb and ferromagnetic garnet hybrid film. Direct magneto-optical observations reveal a strong interaction between the superconducting vortices in Nb and the magnetic domains in the garnet, resulting in a unique coupled domain structure. The cooperative motion of vortices and domain walls results in an enhanced pinning and a modified electromagnetic response of the hybrid similar to that in type I superconductors. Application of ac field, routinely used for equilibration of domains, leads to their significant contraction. Our calculations explain this effect by a domain shrinkage instability induced by the vortex annihilation around oscillating domain walls.Read less <
English Keywords
74.81.Bd
Granular
melt-textured
amorphous
and composite superconductors
74.25.-q
Properties of superconductors
74.78.Fk
Multilayers
superlattices
heterostructures
Origin
Hal imported