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Communication—formation of a superconducting MgB2-containing coating on niobium by plasma electrolytic oxidation

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<mark>Journal publication date</mark>16/03/2019
<mark>Journal</mark>ECS Journal of Solid State Science and Technology
Issue number3
Number of pages3
Pages (from-to)N39-N41
Publication StatusPublished
<mark>Original language</mark>English


The feasibility of generating superconducting coatings on niobium using plasma electrolytic oxidation (PEO) is demonstrated. A silicate-phosphate electrolyte was employed containing MgB2 particles. The coatings were examined by scanning electron microscopy and X-ray diffraction. The coatings contained crystalline Nb2O5, SiO2-rich amorphous material, and incorporated MgB2. The magnetic moment-temperature curve determined using a superconducting quantum interference device (SQUID) magnetometer revealed a transition to the superconducting state at 39 K, characteristic of MgB2. The increasing negative magnetic moment of MgB2 below 39 K is proposed to be due to differences in the critical fields of individual MgB2 clusters.