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AC Field Effects on Vortex Avalanches in Mg0.975Al0.025B2 Superconductors

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Abstract

Magnetization measurements have been performed on Mg1−xAlxB2 superconductors (x = 0.025) in the temperature range 4–35 K and in a magnetic field up to 9T using VSM. At low fields (< 2 T), large vortex instabilities (vortex avalanches) are observed in the doped samples. As the temperature increases, the positions of avalanches are shifted to lower fields. An external AC field has been applied to shake the vortices. Upon shaking, the positions of avalanches have been observed to shift to higher fields.

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References

  1. Ullmaier H.: Irreversible Properties of Type II Superconductors. Springer, Berlin (1975)

    Book  Google Scholar 

  2. Bean C.P.: Magnetization of hard superconductors. Phys. Rev. Lett. 8, 250 (1962)

    Article  MATH  Google Scholar 

  3. Jin G.; et al.: Dependency of flux jump on temperature and field-sweep rate for textured (Nd1/3Eu1/3Gd1/3)Ba2Cu3O7- δ bulk superconductor with Gd-211 particles. J. Supercond. Nov. Magn. 21, 107–111 (2008)

    Article  Google Scholar 

  4. Zhao Z.W.; et al.: Suppression of superconducting critical current density by small flux jumps in MgB2 thin films. Phys. Rev. B. 65(6), 064512 (2002)

    Article  Google Scholar 

  5. Ansari I.A.; et al.: The effect of nano-alumina on structural and magnetic properties of MgB2 superconductors. Supercond Sci. Technol. 20, 827–831 (2007)

    Article  MathSciNet  Google Scholar 

  6. Dou S.X.; et al.: Flux jumping and a bulk-to-granular transition in the magnetization of a compacted and sintered MgB2 superconductor. Phys. C Supercond. 361(2), 79–83 (2001)

    Article  Google Scholar 

  7. Treiber S.; et al.: Unusual flux jumps above 12 K in non-homogeneous MgB2 thin films. Supercond. Sci. Technol. 25(6), 065010 (2012)

    Article  Google Scholar 

  8. Colauto F.; et al.: Mapping flux avalanches in MgB2 films—equivalence between magneto-optical imaging and magnetic measurements. Supercond. Sci. Technol. 20, L48–L50 (2007)

    Article  Google Scholar 

  9. Treiber S., Albrecht J.: The formation and propagation of flux avalanches in tailored MgB2 films. New J. Phys. 12, 093043 (2010)

    Article  Google Scholar 

  10. Cuadra-Solís P.d.J.; et al.: Vortex avalanches induced by single high-frequency pulses in MgB2 films. J. Supercond. Nov. Magn. 24, 395–400 (2011)

    Article  Google Scholar 

  11. Salem A.F., Ziq K.A., Bahgat A.A.: Scaling behavior in aluminum doped MgB2 superconductor. J. Supercond. Nov. Magn. 26(5), 1517–1520 (2013)

    Article  Google Scholar 

  12. Johansen T.H.; et al.: Dendritic magnetic instability in superconducting MgB2 films. Europhys. Lett. 59(4), 599–605 (2002)

    Article  Google Scholar 

  13. Mints R.G.: Flux creep and flux jumping. Phys. Rev. B. 53(18), 12311 (1996)

    Article  Google Scholar 

  14. Chabanenko V.V.; et al.: The structure of vortex matter avalanches in a niobium plate. Phys. C Supercond 369(1–4), 82–86 (2002)

    Article  Google Scholar 

  15. Mints R.G., Rakhmanov A.L.: Critical state stability in type-II superconductors and superconducting-normal-metal composites. Rev. Mod. Phys. 53(3), 551 (1981)

    Article  Google Scholar 

  16. Avraham N.: Study of the Thermodynamic Nature of the Disorder-Driven Vortex Matter Phase Transition. Weizmann Institute of Science, Rehovot (2000)

    Google Scholar 

  17. Brandt E.H., Mikitik G.P.: Why an ac magnetic field Shifts the irreversibility line in type-II superconductors. Phys. Rev. Lett. 89(2), 027002 (2002)

    Article  Google Scholar 

Download references

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Authors and Affiliations

  1. Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia

    A. F. Salem & K. A. Ziq

  2. Department of Physics, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt

    A. A. Bahgat

Authors
  1. A. F. Salem
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  2. K. A. Ziq
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  3. A. A. Bahgat
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Correspondence to A. F. Salem.

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Salem, A.F., Ziq, K.A. & Bahgat, A.A. AC Field Effects on Vortex Avalanches in Mg0.975Al0.025B2 Superconductors. Arab J Sci Eng 40, 2059–2062 (2015). https://doi.org/10.1007/s13369-015-1603-3

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  • DOI: https://doi.org/10.1007/s13369-015-1603-3

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