Magnetic flux penetration process in two-dimensional superconductor covered with ferromagnetic particle array

Yukio Nozaki, Yoshichika Otani, Katharina Runge, Hideki Miyajima, Bernard Pannetier, Jean Pierre Nozières, Gerard Fillion

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The magnetostatic effect of a ferromagnetic particle array on an underlying two-dimensional superconducting Nb thin film was investigated in terms of flux penetration processes by means of high sensitive magnetometry. For bare Nb film, a large drop in magnetization due to a flux rearrangement appeared in the low field region below 2.5 mT. However, once magnetic particles were fabricated on the surface of the Nb film, the drop was not observed. In this configuration, the ferromagnetic particles seem to behave as flux guides for the external magnetic field, whereby the flux distribution inside the superconductor is well regulated. Furthermore, a periodical oscillation was observed in the hysteresis loops. This behavior is associated with a flux quantization in the regions where the superconductivity is suppressed by the stray field of the ferromagnetic particles. The local flux density distribution around the ferromagnetic particles was evaluated by using the London equation, and the magnetization curve of the Nb film with periodically modulated superconducting order parameter was calculated.

Original languageEnglish
Pages (from-to)8571-8577
Number of pages7
JournalJournal of Applied Physics
Volume79
Issue number11
Publication statusPublished - 1996 Jun 1

Fingerprint

magnetic flux
penetration
flux quantization
magnetization
magnetostatics
magnetic measurement
density distribution
superconductivity
flux density
hysteresis
oscillations
curves
thin films
configurations
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Nozaki, Y., Otani, Y., Runge, K., Miyajima, H., Pannetier, B., Nozières, J. P., & Fillion, G. (1996). Magnetic flux penetration process in two-dimensional superconductor covered with ferromagnetic particle array. Journal of Applied Physics, 79(11), 8571-8577.

Magnetic flux penetration process in two-dimensional superconductor covered with ferromagnetic particle array. / Nozaki, Yukio; Otani, Yoshichika; Runge, Katharina; Miyajima, Hideki; Pannetier, Bernard; Nozières, Jean Pierre; Fillion, Gerard.

In: Journal of Applied Physics, Vol. 79, No. 11, 01.06.1996, p. 8571-8577.

Research output: Contribution to journalArticle

Nozaki, Y, Otani, Y, Runge, K, Miyajima, H, Pannetier, B, Nozières, JP & Fillion, G 1996, 'Magnetic flux penetration process in two-dimensional superconductor covered with ferromagnetic particle array', Journal of Applied Physics, vol. 79, no. 11, pp. 8571-8577.
Nozaki Y, Otani Y, Runge K, Miyajima H, Pannetier B, Nozières JP et al. Magnetic flux penetration process in two-dimensional superconductor covered with ferromagnetic particle array. Journal of Applied Physics. 1996 Jun 1;79(11):8571-8577.
Nozaki, Yukio ; Otani, Yoshichika ; Runge, Katharina ; Miyajima, Hideki ; Pannetier, Bernard ; Nozières, Jean Pierre ; Fillion, Gerard. / Magnetic flux penetration process in two-dimensional superconductor covered with ferromagnetic particle array. In: Journal of Applied Physics. 1996 ; Vol. 79, No. 11. pp. 8571-8577.
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