Improved Superconducting Properties in Bulk MgB2 Prepared by High Energy Milling of Mg and B Powder

Details Improved Superconducting Properties in Bulk MgB2 Prepared by High Energy Milling of Mg and B Powder Improved Superconducting Properties in Bulk MgB2 Prepared by High Energy Milling of Mg and B Powder

2006-07-13

arxiv.org/abs/cond-mat/0607318v1

Supercond. Sci. Technol. 19 (2006) pp.1215_1218

Physics

Condensed Matter

Superconductivity

12 pages, 6 figures

Scientific paper

10.1088/0953-2048/19/11/021

The MgB2 bulks were prepared by high energy milling of Mg and B powder. The correlations among milling times, microstructure and superconducting properties were investigated in MgB2 bulks. Samples were characterized by x-ray diffraction (XRD), energy dispersive spectrometry (EDX) and scanning electron microscope (SEM), and the magnetization properties were examined by a Superconducting quantum interfere device (SQUID) magnetometer. It showed that the high energy milling is an effective approach to get fine crystalline (40-100nm) bulk MgB2 with good grain connectivity and high Jc performance. The critical current density reaches to 2.0X10E6A/cm2 at 15K and 0.59T, 5.7X10E5A/cm2 at 2T and 3.0X10E4A/cm2 at 5T.

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