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Superconducting MgB 2 thin films have been fabricated by 80 keV 11 B ion implantation into commercial Mg ribbon with 11 B doses up to 10 18 ions/cm 2 , followed by thermal annealing at 500 °C. Temperature dependent dc magnetization measurements confirmed superconducting phase transitions between 11 and 18 K for samples containing nanocrystalline MgB 2(More)
Forming colloidal solutions containing semiconductor quantum-sized nanoparticles (NPs) with clean surface has been a long-standing scientific challenge. In this contribution, we report a ''top-down'' method for the fabrication of Ge NPs by laser ablation of a Ge target in deionized water without adding any stabilizing reagents. The initial Ge NPs in(More)
—By implanting high fluence B into Mg targets, we demonstrate clearly that superconducting MgB 2 thin films can be formed at a low process temperature. The superconducting transition temperature values observed are dependent on the growth condition. The ion beam synthesis experimental data are discussed and compared with simulation results of the B(More)
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