Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Raedts, S."'
The use of artificial defects is known to enhance the superconducting critical parameters of thin films. In the case of conventional superconductors, regular arrays of submicron holes (antidots) substantially increase the critical temperature Tc(H) a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412102
We explore the flux-jump regime in type-II Pb thin films with a periodic array of antidots by means of magneto-optical measurements. A direct visualization of the magnetic flux distribution allows to identify a rich morphology of flux penetration pat
Externí odkaz:
http://arxiv.org/abs/cond-mat/0409391
Publikováno v:
Phys. Rev. B 70, 144504 (2004)
We have studied the influence of a square array of pinning centers on the dynamics of vortex avalanches in Pb thin films by means of ac- and dc- magnetization measurements. Close to the superconducting transition Tc the commensurability between the v
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407737
Publikováno v:
Phys. Rev. B 70, 054515 (2004)
The influence of a periodic landscape of pinning sites on the vortex dynamics in Pb thin films is explored by ac-susceptibility measurements. For different amplitudes h of the ac-drive, the ac-susceptibility x=x'+ix'' exhibits a complex field depende
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407740
Publikováno v:
Physical Review B 70, 024509 (2004)
We performed ac-susceptibility measurements to explore the vortex dynamics and the flux pinning properties of superconducting Pb films with an array of micro-holes (antidots) and non-fully perforated holes (blind holes). A lower ac-shielding together
Externí odkaz:
http://arxiv.org/abs/cond-mat/0403550
Publikováno v:
Eur. Phys. J. B 37, 19-24 (2004)
We have studied the dynamic response of Pb thin films with a square array of antidots by means of ac susceptibility chi(T,H) measurements. At low enough ac drive amplitudes h, vortices moving inside the pinning potential give rise to a frequency- and
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402299
We investigate anisotropy in the vortex pinning in thin superconducting films with a square array of rectangular submicron holes ("antidots"). The size of the antidots is chosen in such a way that it corresponds to a saturation number n_s=1, i.e. eac
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302252
Publikováno v:
Phys. Rev. B 68, 214504 (2003)
We have measured the in-plane anisotropy of the vortex mobility in a thin Pb film with a square array of antidots. The Lorentz force, acting on the vortices, was rotated by adding two perpendicular currents and keeping the amplitude of the net curren
Externí odkaz:
http://arxiv.org/abs/cond-mat/0302173
Publikováno v:
Phys. Rev. B. 67, 064502 (2003)
We explore the dynamic response of vortex lines in a Pb thin film with a periodic array of antidots by means of ac-susceptibility measurements. For low drive field amplitudes, within the Campbell regime, vortex motion is of intra-valley type and the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301118
Publikováno v:
New Trends in Superconductivity, J. F. Annett and S. Kruchinin (eds.), NATO Science Series II: Mathematics, Physics and Chemistry, vol. 67, pp. 365-373, Kluwer Academic Publishers, Dordrecht (2002)
The pinning properties of type-II superconductors can be efficiently controlled by using laterally nanostructured ferromagnet / superconductor bilayers. This will be illustrated by studying the flux pinning in thin superconducting Pb films which are
Externí odkaz:
http://arxiv.org/abs/cond-mat/0201302