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Superconducting films with T c=39 K prepared from stoichiometric MgB2 targets

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Abstract

Oriented films of MgB2 high-T c superconductor are synthesized by pulsed laser sputtering of stoichiometric MgB2 targets with subsequent annealing of the amorphous Mg-B material deposited onto MgO(111) substrates. The critical temperature of the films depends on the purity of the targets sputtered. The purification of boron powder in a vacuum makes it possible to minimize the content of impurities in the targets and to prepare MgB2 films exhibiting a critical temperature above 39 K and a sharp inductive transition. A high room-temperature to residual resistivity ratio (more than 3) indicates the good quality of the films.

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Authors and Affiliations

  1. Lebedev Physics Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia

    S. I. Krasnosvobodtsev, A. V. Varlashkin, N. P. Shabanova & A. I. Golovashkin

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  1. S. I. Krasnosvobodtsev
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  2. A. V. Varlashkin
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  3. N. P. Shabanova
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  4. A. I. Golovashkin
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Translated from Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 73, No. 8, 2003, pp. 136–138.

Original Russian Text Copyright © 2003 by Krasnosvobodtsev, Varlashkin, Shabanova, Golovashkin.

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Krasnosvobodtsev, S.I., Varlashkin, A.V., Shabanova, N.P. et al. Superconducting films with T c=39 K prepared from stoichiometric MgB2 targets. Tech. Phys. 48, 1071–1073 (2003). https://doi.org/10.1134/1.1607484

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  • DOI: https://doi.org/10.1134/1.1607484

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