A single crystal of MgAlB4 compared with polycrystalline Mg1−xAlxB2 with x near 0.5

We report on the structure and resistivity of a mm size MgAlB4 single crystal (SC). The structure determined from SC X-ray diffraction is in very good agreement with that reported by Margadonna et al. [Phys. Rev. B 66 (2002) 14518]. The resistivity of the SC exhibited a Bloch-Gruneisen-like temperat...

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Published inPhysica. C, Superconductivity Vol. 391; no. 3; pp. 223 - 229
Main Authors Chashka, K.B., Fisher, B., Kapon, M., Patlagan, L., Reisner, G.M.
Format Journal Article
LanguageEnglish
Published 01.09.2003
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Summary:We report on the structure and resistivity of a mm size MgAlB4 single crystal (SC). The structure determined from SC X-ray diffraction is in very good agreement with that reported by Margadonna et al. [Phys. Rev. B 66 (2002) 14518]. The resistivity of the SC exhibited a Bloch-Gruneisen-like temperature dependence and showed no transition to superconductivity down to 4.5 K. We report also on the structure, temperature dependence of resistivity and thermo-power of polycrystalline Mg1-xAlxB2 with x around 0.5, prepared for comparison.
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ISSN:0921-4534
DOI:10.1016/S0921-4534(03)01268-1