Journal
PHYSICAL REVIEW B
Volume 79, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.132501
Keywords
barium compounds; ferrites; flux pinning; magnetic domains; metal-insulator boundaries; niobium; superconducting materials; superconducting thin films
Funding
- FWO
- GOA
- IAP projects
- ESF-NES Research Networking
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A thin superconducting (S) film reduces the mobility of magnetic domains in an underlying ferromagnet (F). The magnetic domain pattern of a barium hexaferrite single crystal was imaged as a function of temperature and external magnetic field, in both presence and absence of a covering niobium film. Comparative analysis of these two cases reveals that the relaxation of the domains is hampered, if the external field is changed while the Nb-film is superconducting. This effect in the S/F hybrids is interpreted in terms of a vortex-mediated pinning of magnetic domains by pinning centers in the superconductor.
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