Crystal growth, structure, and physical properties of Ln2PdGa12 (Ln=La, Pr, Nd, and Sm)

Magnetism and weak electronic correlations in Ce2PdGa12

“…For B > 3 T, C/T 0.35 K (B) can be approximated by a power-law relation C/T = γ + cB −2 (solid line in the inset of figure 1(c)), with the coefficients γ = 0.029 J mol −1 K −2 and c = 2.74 J T 2 mol −1 K −2 . The parameter γ represents a purely electronic contribution to the specific heat of Ce 2 PdGa 12 , and its low magnitude does not support the heavy-fermion scenario that was indicated in [3,4].…”

“…The compounds RE 2 MGa 12 , where RE represents a rare-earth element (RE = La, Ce, Sm, Nd, Pr) and M stands for a d-electron transition metal (M = Ni, Cu, Pd, Pt), crystallize with a layered tetragonal crystal structure of the space group P4/nbm (Z = 2) [1][2][3][4][5]. The unit cell of these polygallides consists of MGa 6 segments and Ga atoms segments, which are separated by RE atom sheets.…”

“…The unit cell of these polygallides consists of MGa 6 segments and Ga atoms segments, which are separated by RE atom sheets. Most of these phases order antiferromagnetically with Nèel temperatures ranging from 2.9 K for Nd 2 CuGa 12 to 18 K for Pr 2 PdGa 12 and Nd 2 NiGa 12 [2][3][4].…”

“…The Sommerfeld coefficient measured just above T N was 140 mJ mol −1 K −2 , while that extrapolated from the ordered state down to 0 K was a factor of two smaller [1] (note that after the original paper the γ value is quoted here per formula unit). Therefore, assigning this compound to a family of heavy-fermion antiferromagnets [3,4] seems controversial. In the present study, we aimed at verifying the electronic ground state in Ce 2 PdGa 12 by means of heat capacity and electrical resistivity measurements performed on high-quality single-crystalline samples in broad ranges of temperature and magnetic field strength.…”

Adventures in Crystal Growth: Synthesis and Characterization of Single Crystals of Complex Intermetallic Compounds

“…Several isostructural analogues of Ln 2 MGa 12 (Ln = La–Nd; M = Ni, Cu, Pd) were grown to investigate the effects of structural stability and carrier density by transition metal substitution in the Ln 2 MGa 12 phases. − The structure Ce 2 PdGa 12 is shown in Figure , and compounds adopting the Ce 2 NiGa 12 structure type crystallize in the tetragonal P 4/ nbm space group with lattice parameters of ∼6 × 6 × 15 Å 3 . Powder X-ray diffraction patterns indicate that La 2 CuGa 12 is isomorphous to Sm 2 NiGa 12 , and subsequent powder neutron measurements led to modeling of the static disorder.…”