Ion Implantation and Transient Melting: A New Approach to Formation of Superconducting MgB2 Phases |
| J. Piekoszewskia,d, W. Kempińskib, J. Stankowskib, F. Prokertc, E. Richterc, J. Stanisławskia, Z. Wernera,e and W. Szymczyka
aThe Andrzej Sołtan Institute for Nuclear Studies, 05-400 Otwock/Świerk, Poland bInstitute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland cForschungszentrum Rossendorf e.V. Institut für Ionenstrahlphysik, und Materialforschung, Postfach 510119, 01314 Dresden, Germany dInstitute of Nuclear Chemistry and Technology, Dorodna 16, 03-145 Warszawa, Poland eInstitute of Physical Chemistry, Polish Academy of Sciences, M. Kasprzaka 44/52, 01-224 Warszawa, Poland |
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| An attempt to synthesize superconducting MgB2 inter-metallic compound from the liquid state is presented. The process consists of two steps. In the first one, boron ions are implanted into a magnesium substrate. In the second one, the near-surface region of such system is melted by short, intense hydrogen plasma pulses without necessity of annealing in Mg vapor. A magnetically modulated microwave absorption method was used to detect superconducting regions in the obtained MgB2 layer. Percolation between nano-regions (islands) of MgB2 has not been observed. However, a superconducting state of the insulated islands has been experimentally proven with transition temperatures TC as high as 31 K. |
| DOI: 10.12693/APhysPolA.106.861 PACS numbers: 74.70.-b, 74.78.-w |