Preparation and characterisation of Ru doped MgB2

Jean-Claude Grivel, Olfert Joakim Holte

Research output: Contribution to journalJournal articleResearchpeer-review


Samples with Mg1−xRuxB2 nominal stoichiometry were prepared by sintering at 800°C. The critical transition temperature decreases up to a substitution level of x≈0.015. A maximum solubility limit slightly in excess of 1at.% Ru for Mg is confirmed by energy dispersive spectroscopy measurements. From and beyond this limit, an unidentified phase appears in the X-ray diffraction patterns. Interestingly, the lattice parameters of the MgB2 phase are constant up to x=0.015, but start to decrease for higher Ru contents. This feature could be related to the fact that a Mg–Ru impurity phase results in a Mg-deficient (Mg,Ru)B2 matrix.

Original languageEnglish
JournalPhysica C: Superconductivity and its Applications
Pages (from-to)229-232
Publication statusPublished - 2013

Bibliographical note

This work was supported by the Danish Agency for Science, Technology and Innovation


  • MgB2
  • Doping
  • Ruthenium


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