Crystal growth and magnetic properties of Pr 3 Co 2+x Ge 7 and the Sn-stabilized Ln 3 Co 2+x Ge 7−y sn y (Ln = Pr, Nd, Sm)
Single crystals of the ternary Pr 3 Co 2+x Ge 7 and Ln 3 Co 2+x Ge 7 − y Sn y (Ln = Pr, Nd, Sm) adopting a disordered version of the La 3 Co 2 Sn 7 structure type have been prepared via flux-growth methods and characterized by single crystal X-ray diffraction. The structure consists of two lanthanide crystallographic sites with one occupying a cuboctahedral coordination environment and a second in a trigonal prismatic environment. The structure can also be described as an intergrowth of AuCu 3 and CeNiSi 2 structure types, and the stability of the germanide analogues requires Sn incorporation and Co site preferences. Magnetic properties of the Pr 3 Co 2+x Ge 7 − y Sn y series are highlighted with the Sn-substituted Pr 3 Co 2.514(5) Ge 6.66(7) Sn 0.360(2) orders magnetically near 5.8 K, while the germanide Pr 3 Co 2.3376(5) Ge 7.056(7) exhibits magnetic transitions at 5.3 and 9.3 K, arising from the magnetic sublattices with field-dependent magnetization revealing three metamagnetic transitions at 0.46, 0.80, and 2.1 T.
Publication Source (Journal or Book title)
Crystal Growth and Design
Khan, M., McCandless, G., Benavides, K., Martin, T., Palacios, A., Samuel, A., Young, D., & Chan, J. (2018). Crystal growth and magnetic properties of Pr 3 Co 2+x Ge 7 and the Sn-stabilized Ln 3 Co 2+x Ge 7−y sn y (Ln = Pr, Nd, Sm). Crystal Growth and Design, 18 (10), 6028-6034. https://doi.org/10.1021/acs.cgd.8b00868