Journal of Superconductivity and Novel Magnetism

, Volume 28, Issue 2, pp 387–390 | Cite as

Growth of Stable Bilayer CrO2/MgB2 Films by Pulsed Laser Deposition

  • N. S. Alzayed
  • S. Soltan
  • M. Shahabuddin
  • A. El-Naggar
  • I. V. Kityk
  • S. E. Qaid
  • Jafar M. Parakkandy
  • M. S. Shah
  • Niyaz Ahmad Madhar
Original Paper
First Online:
Received:
Accepted:

Abstract

We have used the pulsed laser deposition (PLD) technique followed by post-annealing process with magnesium vapor at 700∘C for 30 min to grow a high-quality CrO2/MgB2 bilayer prepared on Al2O3 (1102) single crystal. The X-ray diffraction patterns showed high-quality orientated growth of MgB2 phase. The obtained films were approximately 300 nm thick and had lateral dimensions of 5×5 mm2. SQUID magnetometry, magneto-optical Faraday microscopy, and magneto-transport techniques were used in order to measure the critical current density (JC) that was found to be 7– 9×106 A/cm2 at 15 K. Transition temperature (TC) for the films was ∼37 K. The obtained magnetic hysteresis loops at low temperatures exhibited asymmetry with respect to H = 0. This can be explained in terms of pinning of flux lines in the films due to magnetic interaction with the ferromagnetic CrO2 layer.

Keywords

Magneto-optical MgB2 thin film Bilayer film Ferromagnetic CrO2 

Notes

Acknowledgments

The authors are thankful to King Abdulaziz City for Science & Technology, Saudi Arabia for funding this work under The National Plan for Science, Technology and Innovation Project No. (10-NAN1171-02). We also thank S. Treiber and J. Albrecht for the work on Magneto optical experiment.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • N. S. Alzayed
    • 1
  • S. Soltan
    • 2
    • 3
  • M. Shahabuddin
    • 1
  • A. El-Naggar
    • 1
  • I. V. Kityk
    • 4
  • S. E. Qaid
    • 1
  • Jafar M. Parakkandy
    • 1
  • M. S. Shah
    • 1
  • Niyaz Ahmad Madhar
    • 1
  1. 1.Department of Physics and Astronomy, College of ScienceKing Saud UniversityRiyadhSaudi Arabia
  2. 2.Max-Planck-Institute (FKF)StuttgartGermany
  3. 3.Department of Physics, Faculty of ScienceHelwan UniversityCairoEgypt
  4. 4.Electrical Engineering DepartmentCzestochowa University TechnologyCzestochowaPoland

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