Crystal growth, structure, and physical properties of Ln(Cu,Ga) 3-x(Ln=La-Nd, Eu; x≈0.2)
Single crystals of Ln(Cu,Ga) 13-x(Ln=La-Nd, Eu; x≈0.2) were grown using Ga flux and their structures determined by single-crystal X-ray diffraction. The Ln(Cu,Ga) 13-x (Ln=La-Nd, Eu; x≈0.2), adopting NaZn 13 structure type, crystallizes in the cubic Fm3̄c (No. 226) space group, with Z=8 and lattice parameters a≈11.8A° .Magnetic susceptibility and heat capacity measurements do not show any indication of long-range magnetic ordering down to 2 K for magnetic analogues. Metallic behavior is observed in the range of 2-300 K for each compound. A large positive magnetoresistance up to 154% at a field (μ )OH) of 9 T is also observed for Pr(Cu,Ga) 12.85(1). Most interestingly, the Pr analogue shows T 2 temperature-dependent resistivity and satisfies Kadowaki- Woods relation, which is indicative of heavy-fermion behavior. Here, we present the crystal structures and physical properties of Ln(Cu,Ga) 13-x (Ln=La-Nd, Eu; x≈0.2). © 2009 American Chemical Society.
Publication Source (Journal or Book title)
Chemistry of Materials
Cho, J., Thomas, E., Nambu, Y., Capan, C., Karki, A., Young, D., Kuga, K., Nakatsuji, S., & Chan, J. (2009). Crystal growth, structure, and physical properties of Ln(Cu,Ga) 3-x(Ln=La-Nd, Eu; x≈0.2). Chemistry of Materials, 21 (14), 3072-3078. https://doi.org/10.1021/cm803297q