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arXiv · 1102.5623

A sol-gel method for growing superconducting MgB2 films

Liping Chen·Chen Zhang·Yinbo Wang·Yue Wang·Qingrong Feng·Zizhao Gan·Junzhi Yang·Xingguo Li
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Abstract

In this paper we report a new sol-gel method for the fabrication of MgB2 films. Polycrystalline MgB2 films were prepared by spin-coating a precursor solution of Mg(BH_4)_2 diethyl ether on (001)Al2O3 substrates followed with annealing in Mg vapor. In comparison with the MgB2 films grown by other techniques, our films show medium qualities including a superconducting transition temperature of Tc ~ 37 K, a critical current density of Jc(5 K, 0 T) ~ 5 {\times} 10^6 A cm^{-2}, and a critical field of H_{c2}(0) ~ 19 T. Such a sol-gel technique shows potential in the commercial fabrication of practically used MgB2 films as well as MgB2 wires and tapes.

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Liping Chen, Chen Zhang, Yinbo Wang, Yue Wang, Qingrong Feng, Zizhao Gan, Junzhi Yang, Xingguo Li. 2011-02-28. A sol-gel method for growing superconducting MgB2 films. https://doi.org/10.1088/0953-2048%2F24%2F1%2F015002

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