TY - JOUR
T1 - Nonmagnetic ground states and phase transitions in the caged compounds PrT 2Zn 20 (T=Ru, Rh and Ir)
AU - Onimaru, T.
AU - Matsumoto, K. T.
AU - Nagasawa, N.
AU - Inoue, Y. F.
AU - Umeo, K.
AU - Tamura, R.
AU - Nishimoto, K.
AU - Kittaka, S.
AU - Sakakibara, T.
AU - Takabatake, T.
PY - 2012/7/25
Y1 - 2012/7/25
N2 - We performed electrical resistivity ρ, magnetic susceptibility χ, specific heat C and electron diffraction measurements on single-crystalline samples of PrT 2Zn 20 (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 14K, irrespective of the T element, which can be moderately reproduced by a doublet-triplet model. For T=Ru, a structural transition occurs at T s=138K, below which no phase transition appears down to 0.04K. On the other hand, for T=Ir, antiferroquadrupole (AFQ) ordering arising from the nonmagnetic Γ 3 doublet takes place at T Q=0.11K. For T=Rh, despite a structural transition between 170 and 470K, the CEF ground state is still the non-Kramers Γ 3 doublet. However, no phase transition due to the Γ 3 doublet was observed even down to 0.1K.
AB - We performed electrical resistivity ρ, magnetic susceptibility χ, specific heat C and electron diffraction measurements on single-crystalline samples of PrT 2Zn 20 (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 14K, irrespective of the T element, which can be moderately reproduced by a doublet-triplet model. For T=Ru, a structural transition occurs at T s=138K, below which no phase transition appears down to 0.04K. On the other hand, for T=Ir, antiferroquadrupole (AFQ) ordering arising from the nonmagnetic Γ 3 doublet takes place at T Q=0.11K. For T=Rh, despite a structural transition between 170 and 470K, the CEF ground state is still the non-Kramers Γ 3 doublet. However, no phase transition due to the Γ 3 doublet was observed even down to 0.1K.
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U2 - 10.1088/0953-8984/24/29/294207
DO - 10.1088/0953-8984/24/29/294207
M3 - Article
C2 - 22773390
AN - SCOPUS:84863689172
SN - 0953-8984
VL - 24
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 29
M1 - 294207
ER -