Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-07-22
Journal of Physics: Conference Series 273 (2011) 012118
Physics
Condensed Matter
Strongly Correlated Electrons
accepted for publication in the proceedings of SCES 2010
Scientific paper
10.1088/1742-6596/273/1/012118
Rare-earth metal filled skutterudites RPt4Ge12 with R=La-Nd, and Eu exhibit a variety of different ground states, e.g., conventional and unconventional superconductivity in LaPt4Ge12 and PrPt4Ge12, respectively, and intermediate valence behavior in CePt4Ge12. In this work we investigate the magnetic state of NdPt4Ge12 and EuPt4Ge12 by specific heat, dc-susceptibility and magnetization. NdPt4Ge12 shows two magnetic phase transitions at T_N1=0.67 K and T_N2=0.58 K, while EuPt4Ge12 displays a complex magnetic phase diagram below the magnetic ordering temperature of 1.78 K. The specific heat indicates that in NdPt4Ge12 the crystalline electric field (CEF) ground state of the Nd3+ is a quartet and that, as expected, in EuPt4Ge12 the Eu2+ state is fully degenerate.
Grin Yu
Gumeniuk R.
Leithe-Jasper Andreas
Nicklas Michael
Rosner Helge
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