2005/06/30 by M. Monni, C. Ferdeghini, P. Manfrinetti +10 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Analytical Chemistry (journal) #Charge (physics) #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Doping #Electrical resistivity and conductivity #Homologous series #Iron-based superconductors research #Lattice (music) #Magnesium Alloys: Properties and Applications #Materials science #Neutron diffraction #Optics #Physics #Raman spectroscopy #Superconductivity in MgB2 and Alloys #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.73.214508
published as Phys. Rev. B 73, 214508 (2006) · 15 pages, 13 figures; changes: "codoped" instead of "co-doped"; added comments in the Fig. 11 caption Comments 31/1/2006: 16 figures ; new revised version of the manuscript
arxiv created 2006/01/31 · openalex publication_date 2006/06/07 · arxiv updated 2010/03/30 · openalex created_date 2022/05/12 · openalex updated_date 2026/08/05
We prepared a series of Mg_1\ensuremath-x(AlLi)xB2 samples with 0\ensuremath\leqslantx\ensuremath\leqslant0.45 in order to compensate with Li the electron doping induced by Al. Structural characterization by means of neutron and x-ray diffraction confirms that Li enters the MgB2 structure even though in an amount less than nominal one. We performed susceptibility, resistivity, and specific heat measurements. Vibrational properties were also investigated by means of Raman spectroscopy. We compare these results with those obtained on a homologous series of Mg_1\ensuremath-xAlxB2 samples. The systematic success of scaling the relevant properties with the Al content rather than with the electron doping suggests that lattice deformation plays an important role in tuning the superconducting properties.