Intermetallic compounds of the Ln-M-Ga family (Ln = lanthanide; M = transition metal) show strongly correlated electron behavior giving rise to features such as unusual magnetic ordering, superconductivity, heavy fermion behavior, and large magnetoresistance.  To further the exploration and find new materials with novel physical properties, our objective was to grow single crystals of Ln-Cr-Ga with Ln = Tb-Er.  TbCr0.20Ga3.00, DyCr0.20Ga2.96, HoCr0.14Ga2.65, and ErCr0.13Ga2.60 were successfully grown using self-flux growth methods, and the structures were solved using single crystal X-ray diffraction and characterized by powder X-ray diffraction and elemental analysis.  The compounds crystallize in the cubic space group Pm-3m with lattice parameter a ~ 4.26 �.  Physical property measurements show the Ho analogue has an antiferromagnetic ordering at ~ 6K and the Er analogue has magnetoresistance of positive 25%.  The stability and physical properties of these compounds will be discussed and compared with other transition metal analogues.

Pushing the boundaries of transition metal substitution: Synthesis, characterization, and magnetic properties of LnCrxGa3 (Ln = Tb-Er)

243rd National Meeting (2012)

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