Vortex dynamics

img The current carrying capacity Jc of type-II superconductors is severely limited by dissipation from the motion of vortices, magnetic flux lines that appear inside these materials upon immersion in sufficiently high magnetic fields. The understanding of vortex pinning mechanisms and their optimization in technologically relevant materials is one of the most intriguing and important aspects of superconductivity nowadays, for both fundamental and application-oriented research. Our group investigates vortex pinning in both static and high frequency conditions thanks to a combination of techniques ranging from electric transport to magneto-optical imaging and microwave analysis. Moreover, ion irradiation is employed as a tool to introduce pinning centers with optimal morphology and controlled distributions.

Illustrative publications on the topic

  • - G. Prando, D. Torsello, S. Sanna, M. J. Graf, S. Pyon, T. Tamegai, P. Carretta, and G. Ghigo - Complex vortex-antivortex dynamics in the magnetic superconductor EuFe2(As0.7P0.3)2 - Phys. Rev. B 105, 224504 (2022)
  • - G. Ghigo, M. Fracasso, R. Gerbaldo, L. Gozzelino, F. Laviano, A. Napolitano, G.-H. Cao, M. Graf, R. Prozorov, T. Tamegai, Z. Shi, X. Xing and D. Torsello - High-Frequency ac Susceptibility of Iron-Based Superconductors - Materials 15, 1079 (2022)
  • - A. R. Medema, G. Ghigo, and S. K. Remillard - Influence of columnar defects on magnetic relaxation of microwave nonlinearity in superconducting YBCO resonator devices - Physica C 583, 1353849 (2021)
  • - K. J. Kihlstrom, L. Civale, S. Eley, D. J. Miller, U. Welp, W. K. Kwok, P. Niraula, A. Kayani, G. Ghigo, F. Laviano, S. Fleshler, M. Rupich, and M. Leroux - Large enhancement of the in-field critical current density of YBCO coated conductors due to composite pinning landscape - Supercond. Sci. Technol. 34 015011 (2020)
  • - D. Torsello, R. Gerbaldo, L. Gozzelino, F. Laviano, A. Takahashi, A. Park, S. Pyon, A. Ichinose, T. Tamegai, and G. Ghigo - Twofold role of columnar defects in iron based superconductors - Supercond. Sci. Technol. 33 094012 (2020)
  • - A. Leo, G. Sylva, V. Braccini, E. Bellingeri, A. Martinelli, I. Pallecchi, C. Ferdeghini, L.Pellegrino, M. Putti, G. Ghigo, L. Gozzelino, D. Torsello, S. Pace, A. Nigro, G. Grimaldi - Anisotropic Effect of Proton Irradiation on Pinning Properties of Fe(Se,Te) Thin Films - IEEE Trans. Appl. Supercond. 29, 8616884 (2019)
  • Image Gallery

    ad ad ad ad ad ad ad ad ad



    For collaborations, proposals, thesis requests, lab visits, please contact us:

    Phone: +39 0110907362
    Address: Corso Duca degli Abruzzi, 24 10129 Torino, ITALY
    E-mail: gianluca.ghigo@polito.it