Abstract
We present a systematic 115In NQR study on the heavy-fermion compounds CeRh1-xIrxIn5 (x=0.25, 0.35, 0.45, 0.5, 0.55, and 0.75). The results provide strong evidence for the microscopic coexistence of antiferromagnetic (AF) order and superconductivity (SC) in the range of 0.35≤x≤0.55. Specifically, for x=0.5, TN is observed at 3 K with a subsequent onset of superconductivity at Tc=0.9 K. Tc reaches a maximum (0.94 K) at x=0.45 where TN is found to be the highest (4.0 K). Detailed analysis of the measured spectra indicate that the same electrons participate in both SC and AF order. The nuclear spin-lattice relaxation rate 1/T1 shows a broad peak at TN and follows a T3 variation below Tc, the latter property indicating unconventional SC as in CeIrIn5 (Tc=0.4 K). We further find that, in the coexistence region, the T3 dependence of 1/T1 is replaced by a T-linear variation below T ∼0.4 K, with the value (T1)Tc/(T1)low T increasing with decreasing x, likely due to low-lying magnetic excitations associated with the coexisting magnetism.
| Original language | English |
|---|---|
| Article number | 014511 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 70 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jul 2004 |
Fingerprint
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Coexistence of antiferromagnetic order and unconventional superconductivity in heavy-fermion CeRh1-xIrxIn5 compounds : Nuclear quadrupole resonance studies. / Zheng, Guo-Qing; Yamaguchi, N.; Kan, H.; Kitaoka, Y.; Sarrao, J. L.; Pagliuso, P. G.; Moreno, N. O.; Thompson, J. D.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 70, No. 1, 014511, 07.2004.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Coexistence of antiferromagnetic order and unconventional superconductivity in heavy-fermion CeRh1-xIrxIn5 compounds
T2 - Nuclear quadrupole resonance studies
AU - Zheng, Guo-Qing
AU - Yamaguchi, N.
AU - Kan, H.
AU - Kitaoka, Y.
AU - Sarrao, J. L.
AU - Pagliuso, P. G.
AU - Moreno, N. O.
AU - Thompson, J. D.
PY - 2004/7
Y1 - 2004/7
N2 - We present a systematic 115In NQR study on the heavy-fermion compounds CeRh1-xIrxIn5 (x=0.25, 0.35, 0.45, 0.5, 0.55, and 0.75). The results provide strong evidence for the microscopic coexistence of antiferromagnetic (AF) order and superconductivity (SC) in the range of 0.35≤x≤0.55. Specifically, for x=0.5, TN is observed at 3 K with a subsequent onset of superconductivity at Tc=0.9 K. Tc reaches a maximum (0.94 K) at x=0.45 where TN is found to be the highest (4.0 K). Detailed analysis of the measured spectra indicate that the same electrons participate in both SC and AF order. The nuclear spin-lattice relaxation rate 1/T1 shows a broad peak at TN and follows a T3 variation below Tc, the latter property indicating unconventional SC as in CeIrIn5 (Tc=0.4 K). We further find that, in the coexistence region, the T3 dependence of 1/T1 is replaced by a T-linear variation below T ∼0.4 K, with the value (T1)Tc/(T1)low T increasing with decreasing x, likely due to low-lying magnetic excitations associated with the coexisting magnetism.
AB - We present a systematic 115In NQR study on the heavy-fermion compounds CeRh1-xIrxIn5 (x=0.25, 0.35, 0.45, 0.5, 0.55, and 0.75). The results provide strong evidence for the microscopic coexistence of antiferromagnetic (AF) order and superconductivity (SC) in the range of 0.35≤x≤0.55. Specifically, for x=0.5, TN is observed at 3 K with a subsequent onset of superconductivity at Tc=0.9 K. Tc reaches a maximum (0.94 K) at x=0.45 where TN is found to be the highest (4.0 K). Detailed analysis of the measured spectra indicate that the same electrons participate in both SC and AF order. The nuclear spin-lattice relaxation rate 1/T1 shows a broad peak at TN and follows a T3 variation below Tc, the latter property indicating unconventional SC as in CeIrIn5 (Tc=0.4 K). We further find that, in the coexistence region, the T3 dependence of 1/T1 is replaced by a T-linear variation below T ∼0.4 K, with the value (T1)Tc/(T1)low T increasing with decreasing x, likely due to low-lying magnetic excitations associated with the coexisting magnetism.
UR - http://www.scopus.com/inward/record.url?scp=42749098893&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=42749098893&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.70.014511
DO - 10.1103/PhysRevB.70.014511
M3 - Article
AN - SCOPUS:42749098893
VL - 70
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 1
M1 - 014511
ER -