Crystal structure and magnetic behaviour of ternary YbTGa2 compounds 
(T=Ni,Pd,Pt) and quaternary solid solutions YbPd1-xAgxGa2

Grin, Yu.; Hiebl, K.; Rogl, P.; Godart, C.

doi:10.1016/0925-8388(96)02228-1

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Crystal structure and magnetic behaviour of ternary YbTGa₂ compounds (T=Ni,Pd,Pt) and quaternary solid solutions YbPd_1-xAg_xGa₂

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Grin, Y., Hiebl, K., Rogl, P., & Godart, C. (1996). Crystal structure and magnetic behaviour of ternary YbTGa₂ compounds (T=Ni,Pd,Pt) and quaternary solid solutions YbPd_1-xAg_xGa₂. Journal of Alloys and Compounds, 239(2), 127-130. doi:10.1016/0925-8388(96)02228-1.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-9175-0

Abstract

Compounds YbTGa2 with T = Ni, Pd, Pt and alloys YbPd1-xAgxGa2 have been synthesized by argon high frequency melting from metal ingots in tantalum crucibles followed by homogenization annealing at 600 or 400 degrees C respectively. From X-ray powder diffraction data, Yb{Ni,Pd,Pt}Ga-2 was found to be isotypic with MgCuAl2-type, with a small solid solubility for Ag in YbPdGa2 (0 less than or equal to x less than or equal to 0.2). At 600 degrees C the solid solubility of Pd in beta YbAgGa2 (beta YbAgGa2-type) was 0.7 less than or equal to x less than or equal to 1.0. The YbTGa2 (T = Ni, Pd, Pt) compounds are paramagnets, where the ytterbium adopts the F-2(7/2) ground state. The magnetic results of the solid solution YbPd1-xAgxGa2 are characterized by an intermediate or mixed valence behavior of the ytterbium atom (Yb2+ --> Yb3+), whereas XAS measurements establish a mixed valence system.