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ID 31900
file
creator
Matsumoto, Keisuke
Inoue, Yukihiro
Sakakibara, Toshiro
Karaki, Yoshitomo
Kubota, Minoru
NDC
Physics
description
An antiferroquadrupolar ordering at T_Q=0.11K has been found in a Pr-based superconductor PrIr_2Zn_<20>. The measurements of specific heat and magnetization revealed the non-Kramers Γ_3 doublet ground state with the quadrupolar degrees of freedom. The specific heat exhibits a sharp peak at T_Q=0.11K. The increment of T_Q in magnetic fields and the anisotropic B-T phase diagram are consistent with the antiferroquadrupolar ordered state below T_Q. The entropy release at T_Q is only 20% of Rln2, suggesting that the quadrupolar fluctuations play a role in the formation of the superconducting pairs below T_c=0.05K.
journal title
Physical review letters
volume
Volume 106
issue
Issue 17
start page
177001-1
end page
177001-4
date of issued
2011-04-29
publisher
The American Physical Society
issn
0031-9007
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2011 The American Physical Society
relation url
department
Graduate School of Advanced Sciences of Matter