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

Abstract

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.

arXiv commentaccepted for publication in the proceedings of SCES 2010

References in corpus (3)

• Superconductivity in the New Platinum Germanides MPt4Ge12 (M = Rare-earth and Alkaline-earth Metals) with Filled Skutterudite Structure
• Superconductivity in novel Ge-based skutterudites: {Sr,Ba}Pt_4Ge_{12}
• Superfluid Density and Energy Gap-Function of Superconducting PrPt4Ge12

Cited by in corpus (5)

• A large new family of filled skutterudites stabilized by electron count
• Schottky anomaly and short-range antiferromagnetic correlations in filled skutterudites Pr${}_{1-x}$Eu${}_x$Pt${}_4$Ge${}_{12}$
• Charge-Doping driven Evolution of Magnetism and non-Fermi-Liquid Behavior in the Filled Skutterudite CePt4Ge12-xSbx
• Spin dynamics of S-state ions in the filled skutterudites La1-xRx$Pt4Ge12 (R= Gd, Eu)
• Short-range antiferromagnetic correlations in the superconducting state of filled skutterudite alloys Pr${}_{1-x}$Eu${}_x$Pt${}_4$Ge${}_{12}$