Magnetic order in the filled skutterudites RPt4Ge12 (R = Nd, Eu)

Details Magnetic order in the filled skutterudites RPt4Ge12 (R = Nd, Eu) Magnetic order in the filled skutterudites RPt4Ge12 (R = Nd, Eu)

2010-07-22

arxiv.org/abs/1007.3844v1

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.

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