Periodic magnetization instabilities in a superconducting Nb film with a square lattice of Ni dots
A. Terentiev, D. B. Watkins, L. E. De Long, L. D. Cooley, D. J. Morgan, J. B. Ketterson
DOI 10.1103/PhysRevB.61.R9249 · Physical Review B
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
Isothermal magnetization curves of a superconducting Nb film perforated by a square lattice of Ni dots exhibit quasiperiodic instabilities below ∼4 K, with a field-dependent period equal to the first, second, or third matching fields. The instabilities are found in a range of applied fields well above the saturation matching value, and under conditions where a continuous Nb film with the same dimensions and magnetization remained stable. The results suggest that terraces of matched flux density exist at the border of a flux-depleted zone created by a geometric barrier near the film edge. Geometric effects may thus play an important role in determining the presence or absence of matching effects.
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. | 8.8 | Pressure not reported | unknown |
Similar papers
Interstitial flux phases in a superconducting niobium film with a square lattice of artificial pinning centers
similarity 0.95V. Metlushko et al.
Source status unknown — claims are unverified
Manipulating superconductivity through the domain structure of a ferromagnet: Experimental aspects and theoretical implications
similarity 0.94D. Stamopoulos & M. Pissas
Source status unknown — claims are unverified
Magnetic flux penetration in Nb superconducting films with lithographically defined microindentations
similarity 0.94J. Brisbois et al.
Source status unknown — claims are unverified
Flux Pinning in a Superconductor by an Array of Submicrometer Magnetic Dots
similarity 0.94J. I. Martín et al.
Source status unknown — claims are unverified
Experimental evidence of magnetization modification by superconductivity in a Nb∕Ni81Fe19 multilayer
similarity 0.94Hong-ye Wu et al.
Source status unknown — claims are unverified
Mechanism of the Size Dependence of the Superconducting Transition of Nanostructured Nb
similarity 0.93Sangita Bose et al.
Source status unknown — claims are unverified