Navegação por Assunto "Filmes finos supercondutores"

Resultados 1-8 de 8

    • Anisotropic thermomagnetic avalanche activity in field-cooled superconducting films 

      Colauto, Fabiano; Carmo, Danusa do; Andrade, Antonio Marcos Helgueira de; Oliveira, Ana Augusta Mendonça de; Ortiz, Wilson Aires; Johansen, Tom Henning (2017) [Artigo de periódico]
      The electrodynamic behavior of isotropic superconducting Nb films cooled below their critical temperature in the presence of in-plane applied magnetic fields is investigated using magneto-optical imaging. A specially ...

    • Cascade dynamics of thermomagnetic avalanches in superconducting films with holes 

      Vestgården, Jørn Inge; Colauto, Fabiano; Andrade, Antonio Marcos Helgueira de; Oliveira, Ana Augusta Mendonça de; Ortiz, Wilson Aires; Johansen, Tom Henning (2015) [Artigo de periódico]
      The submicrosecond dynamics of thermomagnetic avalanches in superconducting films with nonconducting holes (antidots) is considered.When such an avalanche reaches a hole, it is quickly filled with magnetic flux, and often ...

    • Crossing fields in thin films of isotropic superconductors 

      Vlasko-Vlasov, Vitalii K.; Colauto, Fabiano; Buzdin, A. A.; Carmo, Danusa do; Andrade, Antonio Marcos Helgueira de; Oliveira, Ana Augusta Mendonça de; Ortiz, Wilson Aires; Rosenmann, Daniel; Kwok, Waikwong (2016) [Artigo de periódico]
      We study interactions of perpendicular and longitudinal magnetic fields in niobium films of different thickness in a wide range of temperatures below the superconducting transition temperature (TC). In 100-nm Nb film at ...

    • Defects controlling electrical and optical properties of electrodeposited Bi doped Cu2O 

      Brandt, Iuri Stefani; Tumelero, Milton André; Martins, Cesar Augusto; Campos, Cristiani Silveira; Faccio, Ricardo; Pasa, Andre Avelino (2018) [Artigo de periódico]
      Doping leading to low electrical resistivity in electrodeposited thin films of Cu2O is a straightforward requirement for the construction of efficient electronic and energy devices. Here, Bi (7 at. %) doped Cu2O layers ...

    • Electrodeposited Cu2O doped with Cl : electrical and optical properties 

      Pelegrini, Silvia; Tumelero, Milton André; Brandt, Iuri Stefani; Della Pace, Rafael Domingues; Faccio, Ricardo; Pasa, Andre Avelino (2018) [Artigo de periódico]
      For understanding the electrical and optical properties of electrodeposited Cl-doped Cu2O thin films, we have studied layers with increasing thickness and Cl concentrations of 0.8 and 1.2 at. %. The deposits were characterized ...

    • Enhancing the effective critical current density in a Nb superconducting thin film by cooling in an inhomogeneous magnetic field 

      Chaves, Davi Araujo Dalbuquerque; Araújo, Ítalo M. de; Carmo, Danusa do; Colauto, Fabiano; Oliveira, Ana Augusta Mendonça de; Andrade, Antonio Marcos Helgueira de; Johansen, Tom Henning; Silhanek, Alejandro; Ortiz, Wilson Aires; Motta, Maycon (2021) [Artigo de periódico]
      Quantitative magneto-optical imaging of a type-II superconductor thin film cooled under zero, homogeneous, and inhomogeneous applied magnetic fields indicates that the latter procedure leads to an enhancement of the screening ...

    • Limiting thermomagnetic avalanches in superconducting films by stop-holes 

      Colauto, Fabiano; Vestgården, Jørn Inge; Andrade, Antonio Marcos Helgueira de; Oliveira, Ana Augusta Mendonça de; Ortiz, Wilson Aires; Johansen, Tom Henning (2013) [Artigo de periódico]
      It is demonstrated that circular holes in superconducting films of Nb can arrest the propagation of thermomagnetic avalanches. The effect was found over a range of temperatures where the material is susceptible to this ...

    • Spin texture on top of flux avalanches in Nb/Al2O3/Co thin film heterostructures 

      Lopes, Rovan Fernandes; Carmo, Danusa do; Colauto, Fabiano; Ortiz, Wilson Aires; Andrade, Antonio Marcos Helgueira de; Johansen, Tom Henning; Baggio-Saitovitch, E.; Pureur Neto, Paulo (2017) [Artigo de periódico]
      We report on magneto-optical imaging, magnetization, Hall effect, and magneto-resistance experiments in Nb/Al2O3/Co thin film heterostructures. The magneto-transport measurements were performed in samples where electrical ...