Abstract

The ternary intermetallic compounds MAB=CaAlSi, SrAlSi, BaAlSi, CaGaSi, SrGaSi, BaGaSi, SrAlGe, BaAlGe, CaGaGe, SrGaGe, BaGaGe, BaInGe, BaAlSn, CaGaSn, SrGaSn, and BaGaSn have been prepared by arc-melting stoichiometric elemental mixtures and structurally characterized by a combination of x-ray powder and electron diffraction. They crystallize as variants of the simple hexagonal AlB2 structure type where trivalent and tetravalent A - and B -type atoms, respectively, form commonly a planar hexagon layer, and structural variations arise from A/B ordering and/or puckering of hexagon layers. The silicides (B=Si) were previously investigated for their superconducting properties. By dc magnetization measurements it is demonstrated that also the germanides SrAlGe, BaAlGe, SrGaGe, and BaGaGe and the stannide BaAlSn are superconductors above 2 K.

Original languageEnglish (US)
Article number064514
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number6
DOIs
StatePublished - Aug 27 2009

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Silicides
hexagons
Superconductivity
Electron diffraction
Superconducting materials
Intermetallics
intermetallics
Structural properties
Magnetization
Melting
superconductivity
germanides
X rays
Atoms
arc melting
silicides
electron diffraction
magnetization
diffraction
atoms

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Structural properties and superconductivity in the ternary intermetallic compounds MAB (M=Ca, Sr, Ba; A=Al, Ga, In; B=Si, Ge, Sn). / Evans, Michael J.; Wu, Yang; Kranak, Verina F.; Newman, Nathan; Reller, Armin; Garcia-Garcia, F. Javier; Häussermann, Ulrich.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 6, 064514, 27.08.2009.

Research output: Contribution to journalArticle

Evans, Michael J. ; Wu, Yang ; Kranak, Verina F. ; Newman, Nathan ; Reller, Armin ; Garcia-Garcia, F. Javier ; Häussermann, Ulrich. / Structural properties and superconductivity in the ternary intermetallic compounds MAB (M=Ca, Sr, Ba; A=Al, Ga, In; B=Si, Ge, Sn). In: Physical Review B - Condensed Matter and Materials Physics. 2009 ; Vol. 80, No. 6.
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AB - The ternary intermetallic compounds MAB=CaAlSi, SrAlSi, BaAlSi, CaGaSi, SrGaSi, BaGaSi, SrAlGe, BaAlGe, CaGaGe, SrGaGe, BaGaGe, BaInGe, BaAlSn, CaGaSn, SrGaSn, and BaGaSn have been prepared by arc-melting stoichiometric elemental mixtures and structurally characterized by a combination of x-ray powder and electron diffraction. They crystallize as variants of the simple hexagonal AlB2 structure type where trivalent and tetravalent A - and B -type atoms, respectively, form commonly a planar hexagon layer, and structural variations arise from A/B ordering and/or puckering of hexagon layers. The silicides (B=Si) were previously investigated for their superconducting properties. By dc magnetization measurements it is demonstrated that also the germanides SrAlGe, BaAlGe, SrGaGe, and BaGaGe and the stannide BaAlSn are superconductors above 2 K.

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