Atomic Structure of the Antiferromagnetic Ga-Pd-Tb 2/1 Approximant to Quasicrystal

Emergence of long-range magnetic order from spin-glass state by tuning electron density in a stoichiometric Ga-based quasicrystal approximant

“…Figure 1 shows powder XRD patterns of the synthesized Ga-Pd-Au-Gd 1/1 ACs with various contents. The pattern at the bottom corresponds to the calculated one obtained from the refined atomic structure model of the Ga-Pd-Tb 1/1 AC [18], which is isostructural to the present compounds. The positions and intensity distributions of the experimental peaks are very well consistent with those of the calculated one indicating that the substituted Au has been dissolved into the structure of the mother Ga-Pd-Gd 1/1 AC resulting in singlephase quaternary 1/1 ACs with various Au contents spanning from 0 to 33 at.%.…”

“…Recently, a new non-Au-based Tsaitype 2/1 AC has been reported to form in the Ga-Pd-Tb system around a composition of Ga50Pd35.5Tb14.5 [12]. This was followed by a comprehensive research done by the present authors to clarify phase stability, atomic structure, and magnetism of Ga-Pd-RE (RE = Gd, Tb, Dy, and Ho) 1/1 and 2/1 ACs [18][19][20].…”