Preparation and Characterisation of Mg1−xRhxB2

A. Pitillas, Jean-Claude Grivel

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Mg1−xRhxB2 samples were prepared by mixing the elemental powders and sintering at 800 °C under Ar atmosphere. Magnetisation measurements show that the critical temperature decreases as the nominal content of Rh is increased at an average rate of −0.8 K/at. %. Energy-dispersive X-ray spectroscopy (EDS) analysis shows that some Rh-enriched phases were formed at high doping levels. Based on these measurements as well as X-ray diffraction patterns, it was determined that Mg can be replaced by Rh up to 2.2–2.5 at. % approximately. Two sets of unidentified reflections appear in the X-ray diffraction patterns from x = 0.01 and above x = 0.020 respectively. The a-axis and c-axis parameters remain almost constant in the doped samples.
Original languageEnglish
JournalJournal of Superconductivity and Novel Magnetism
Volume28
Issue number8
Pages (from-to)2495-2500
ISSN1557-1939
DOIs
Publication statusPublished - 2015

Keywords

  • Doping
  • MgB2
  • Rhodium
  • Diffraction patterns
  • Doping (additives)
  • Energy dispersive spectroscopy
  • Interferometry
  • Magnesium
  • Sintering
  • X ray diffraction
  • X ray spectroscopy
  • Average rate
  • Critical temperatures
  • Doped sample
  • Elemental powders
  • Energy dispersive X ray spectroscopy
  • High doping level

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