Document Type
Article
Publication Date
11-19-2010
Abstract
We report specific heat (C) and magnetization (M) of single crystalline Ce4 Pt12 Sn25 at temperature down to ∼50 mK and in fields up to 3 T. C/T exhibits a sharp anomaly at 180 mK, with a large ΔC/T∼30 J/molCe K2, which, together with the corresponding cusplike magnetization anomaly, indicates an antiferromagnetic (AFM) ground state with a Néel temperature TN =180 mK. Numerical calculations based on a Heisenberg model reproduce both zero-field C and M data, thus placing Ce 4 Pt12 Sn25 in the weak exchange coupling J< Jc limit of the Doniach diagram, with a very small Kondo scale TK TN. Magnetic field suppresses the AFM state at H⊃ ≈0.7 T, much more effectively than expected from the Heisenberg model, indicating additional effects possibly due to frustration or residual Kondo screening. © 2010 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review B - Condensed Matter and Materials Physics
Recommended Citation
Kurita, N., Lee, H., Tokiwa, Y., Miclea, C., Bauer, E., Ronning, F., Thompson, J., Fisk, Z., Ho, P., Maple, M., Sengupta, P., Vekhter, I., & Movshovich, R. (2010). Thermal and magnetic properties of the low-temperature antiferromagnet Ce4 Pt12 Sn25. Physical Review B - Condensed Matter and Materials Physics, 82 (17) https://doi.org/10.1103/PhysRevB.82.174426