Glassy Vortex Dynamics Induced by a Random Array of Magnetic Particles above a Superconductor
Young Sun, M. B. Salamon, K. Garnier, R. S. Averback
DOI 10.1103/PhysRevLett.92.097002 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The magnetic relaxation of a Nb film covered with a random array of permalloy particles has been studied using various procedures. When the sample undergoes a field-cooled process, the magnetic relaxation becomes logarithmic in time. The relaxation rate is nearly temperature independent at low temperature and characteristic glassy dynamics—aging and memory effects—are observed. These results are interpreted as the consequence of pinning by the statistical variation of the number of nanoparticles within the area of a vortex core.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
Similar papers
Enhanced pinning of superconducting vortices by magnetic vortices
similarity 0.95A. Hoffmann et al.
Source status unknown — claims are unverified
Vortex-antivortex coexistence in Nb-based superconductor/ferromagnet heterostructures
similarity 0.95F. Bobba et al.
Source status unknown — claims are unverified
Critical Field for Complete Vortex Expulsion from Narrow Superconducting Strips
similarity 0.94Gheorghe Stan et al.
Source status unknown — claims are unverified
Controllable morphology of flux avalanches in microstructured superconductors
similarity 0.94M. Motta et al.
Source status unknown — claims are unverified
Hysteretic Vortex Pinning in Superconductor-Ferromagnet Nanocomposites
similarity 0.94A. Palau et al.
Source status unknown — claims are unverified
Scaling of the superfluid density in high-temperature superconductors
similarity 0.93C. C. Homes et al.
Source status unknown — claims are unverified