Enhanced pinning in superconducting thin films with graded pinning landscapes

نویسندگان

  • M. Motta
  • F. Colauto
  • W. A. Ortiz
  • J. Fritzsche
  • J. Cuppens
  • W. Gillijns
  • V. V. Moshchalkov
  • T. H. Johansen
  • A. Sanchez
  • A. V. Silhanek
چکیده

landscapes M. Motta, F. Colauto, W. A. Ortiz, J. Fritzsche, J. Cuppens, W. Gillijns, V. V. Moshchalkov, T. H. Johansen, A. Sanchez, and A. V. Silhanek Departamento de F ısica, Universidade Federal de S~ ao Carlos, 13565-905 S~ ao Carlos, SP, Brazil Department of Applied Physics, Chalmers University of Technology, S-412 96 G€ oteborg, Sweden INPAC – Institute for Nanoscale Physics and Chemistry, Nanoscale Superconductivity and Magnetism Group, K.U.Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium Institute for Superconducting and Electronic Materials, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia Department of Physics, University of Oslo, P.O. Box 1048, Blindern, 0316 Oslo, Norway Departament de F ısica, Universitat Aut onoma de Barcelona, 08193 Bellaterra, Barcelona, Spain D epartement de Physique, Universit e de Liège, B-4000 Sart Tilman, Belgium

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Mechanisms of periodic pinning in superconducting thin films

We studied the changes in the superconducting properties of Nb films due to an array of Ni dots used as collective pinning sites. To determine the pinning mechanism, thin Ag layers of varying thicknesses were deposited on the Ni dots prior to the Nb film deposition. The Ag deposited on the pinning dots has little effect on the collective pinning phenomena, which implies that the main pinning me...

متن کامل

Thickness-modulated tungsten–carbon superconducting nanostructures grown by focused ion beam induced deposition for vortex pinning up to high magnetic fields

We report efficient vortex pinning in thickness-modulated tungsten-carbon-based (W-C) nanostructures grown by focused ion beam induced deposition (FIBID). By using FIBID, W-C superconducting films have been created with thickness modulation properties exhibiting periodicity from 60 to 140 nm, leading to a strong pinning potential for the vortex lattice. This produces local minima in the resisti...

متن کامل

Magnetic-force microscopy of vortices in thin niobium films: Correlation between the vortex distribution and the thickness-dependent film morphology

– We demonstrate the possibility to reliably image vortices in superconducting Nb films with a low-temperature magnetic-force microscope. Our force microscope enables to monitor the surface topography as well, allowing to correlate the location of the vortices with specific topographic features. For Nb films of different thickness (32 nm–87 nm) and different Tc (7.9 K–9.1 K) we studied how the ...

متن کامل

Vortex–lattice guided motion on isotropic and anisotropic artificial pinning landscapes

Vortex–lattice dynamics has been studied in superconducting Nb thin films with periodic arrays of magnetic pinning centers. Magnetotransport measurements have been used to study vortex–lattice velocity as a function of the in-plane direction of the driving force. This has been done for samples with arrays of decreasing anisotropy, from rectangular arrays (two-fold symmetry) to square arrays (fo...

متن کامل

Effective vortex pinning in MgB2 thin films

We discuss the pinning properties of MgB2 thin films grown by pulsed-laser deposition (PLD) and by electron-beam (EB) evaporation. Two mechanisms are identified that contribute most effectively to the pinning of vortices in randomly oriented films. The EB process produces low defected crystallites with a small grain size providing enhanced pinning at grain boundaries without any degradation of ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2015