Nonmagnetic ground states and phase transitions in the caged compounds PrT2Zn20(T = Ru, Rh and Ir)
Authors:
- T OnimaruTOT Onimaru
- K T MatsumotoKMK T Matsumoto
- N NagasawaNNN Nagasawa
- Y F InoueYIY F Inoue
- K UmeoKUK Umeo
- R TamuraRTR Tamura
- K NishimotoKNK Nishimoto
- S KittakaSKS Kittaka
- T SakakibaraTST Sakakibara
- T TakabatakeTTT Takabatake
- 6 July 2012
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 24 (29) , 294207
Abstract
We performed electrical resistivity ρ, magnetic susceptibility χ, specific heat C and electron diffraction measurements on single-crystalline samples of PrT2Zn20 (T = Ru, Rh and Ir). The three compounds show the Van Vleck paramagnetic behavior, indicating the nonmagnetic crystalline electric field (CEF) ground states. A Schottky-type peak appears at around 14 K, irrespective of the T element, which can be moderately reproduced by a doublet–triplet model. For T = Ru, a structural transition occurs at Ts = 138 K, below which no phase transition appears down to 0.04 K. On the other hand, for T = Ir, antiferroquadrupole (AFQ) ordering arising from the nonmagnetic Γ3 doublet takes place at TQ = 0.11 K. For T = Rh, despite a structural transition between 170 and 470 K, the CEF ground state is still the non-Kramers Γ3 doublet. However, no phase transition due to the Γ3 doublet was observed even down to 0.1 K.Keywords
This publication has 21 references indexed in Scilit:
- Multiband Superconductivity in Filled-Skutterudite Compounds (Pr1-xLax)Os4Sb12: An Sb Nuclear-Quadrupole-Resonance StudyJournal of the Physical Society of Japan, 2006
- Possible Observation of the Quadrupolar Kondo Effect in Dilute Quadrupolar SystemforPhysical Review Letters, 2006
- Direct Observation of Quadrupolar Excitons in the Heavy-Fermion SuperconductorPhysical Review Letters, 2005
- Observation of Modulated Quadrupolar Structures inPhysical Review Letters, 2005
- Angle-resolved Magnetization Measurements on Antiferroquadrupolar Ordering System PrPb3: Evidence for Anisotropic Quadrupolar InteractionJournal of the Physical Society of Japan, 2004
- Superconductivity and heavy fermion behavior inPhysical Review B, 2002
- Antiferro-Quadrupolar Ordering and Multipole Interactions in PrPb3Journal of the Physical Society of Japan, 2001
- The two-channel Kondo route to non-Fermi-liquid metalsJournal of Physics: Condensed Matter, 1996
- Quadrupolar Kondo effect in uranium heavy-electron materials?Physical Review Letters, 1987
- Magnetic and quadrupolar properties of PrPb3Journal of Magnetism and Magnetic Materials, 1982