The quasiorder-disorder phase transition and peak effect in MgB2 type-II superconducting materials and thin films

Ming Ju Chou, Herng-Er Horng

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The peak effect and the quasiorder-disorder first-order phase transition for Magnesium diboride, MgB2, superconducting bulk materials have been studied. The peak values of the critical current density Jc, and the exact peak positions together with its corresponding half-widths for a constant temperature as well as for a constant applied magnetic field have been calculated by considering the quantum, thermal as well as random fluctuations of the vortex lattice. The results for MgB2 bulk materials are in agreement with the experiment. The peak effect for MgB2 superconducting thin films is also predicted theoretically. The expected peak effect may be observed provided that doping or other experimental techniques are applied to improve the flux pinning of the MgB2 superconducting thin films.

Original languageEnglish
Pages (from-to)128-135
Number of pages8
JournalAnnalen der Physik (Leipzig)
Volume19
Issue number1-2
DOIs
Publication statusPublished - 2010 Feb 1

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disorders
thin films
flux pinning
magnesium
critical current
vortices
current density
magnetic fields
temperature

Keywords

  • Collective pinning
  • Intermetallic compound
  • Peak effect
  • Quasiorder-disorder phase transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

The quasiorder-disorder phase transition and peak effect in MgB2 type-II superconducting materials and thin films. / Chou, Ming Ju; Horng, Herng-Er.

In: Annalen der Physik (Leipzig), Vol. 19, No. 1-2, 01.02.2010, p. 128-135.

Research output: Contribution to journalArticle

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