Multi transitions in MgB2 films prepared by pulsed laser deposition

Yi Zhao; Yuemeng Chi; Ruijuan Nie; Furen Wang

Multi transitions in MgB2 films prepared by pulsed laser deposition

Superconductivity 2007-05-23 v1

Authors: Yi Zhao , Yuemeng Chi , Ruijuan Nie , Furen Wang

Abstract

We have grown MgB2 films in a postannealing process. Precursors were prepared on Al2O3(0001) substrates by codeposition of Mg and MgB2 using pulsed laser deposition technique. Superconducting MgB2 thin films were obtained via an ex situ postannealing process, with various annealing temperatures and durations. In magnetic measurement we found more than one transitions in almost all the samples, and the temperature dependence of the resistance confirmed this phenomena. We proved this is not result of magnesium deficiency. Transportation properties of MgB2 thin films under strong magnetic fields are also studied.

Keywords

MgB2 films pulsed laser deposition multiple transitions postannealing superconductivity

Cite

@article{arxiv.cond-mat/0412776,
  title  = {Multi transitions in MgB2 films prepared by pulsed laser deposition},
  author = {Yi Zhao and Yuemeng Chi and Ruijuan Nie and Furen Wang},
  journal= {arXiv preprint arXiv:cond-mat/0412776},
  year   = {2007}
}

Comments

17 pages, 2 tables, 7 figures

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