TY - JOUR
T1 - Field-induced transitions in anisotropic kondo lattice - Application to CeT2Al10
AU - Kikuchi, Taku
AU - Hoshino, Shintaro
AU - Shibata, Naokazu
AU - Kuramoto, Yoshio
N1 - Funding Information:
Acknowledgments TK was supported by the Global COE Program of the Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT). SH acknowledges the financial support from KAKENHI Grant No. 16H04021. The numerical calculations were partly performed on the supercomputer in the ISSP, University of Tokyo.
Publisher Copyright:
©2017 The Physical Society of Japan.
PY - 2017/9/15
Y1 - 2017/9/15
N2 - The magnetic properties of an anisotropic Kondo lattice are investigated under a magnetic field using dynamical mean field theory and the continuous-time quantum Monte Carlo method. The magnetic phase diagram is determined from the temperature dependence of both uniform and staggered magnetizations in magnetic fields. We find a spin-flop transition inside the antiferromagnetic (AF) phase, whose transition field increases with increasing Kondo coupling while the AF transition temperature decreases. These results cannot be described by a simple spin Hamiltonian and are consistent with the experimental results of the field-induced transition observed in CeT2Al10 (T = Ru, Os). The anisotropic susceptibilities of CeT2Al10 are reproduced in the whole temperature range by incorporating the effects of the crystalline electric field (CEF) in the anisotropic Kondo lattice. We also propose a possible explanation for the difference in anisotropies between the magnetic susceptibility and AF moments observed in experiments.
AB - The magnetic properties of an anisotropic Kondo lattice are investigated under a magnetic field using dynamical mean field theory and the continuous-time quantum Monte Carlo method. The magnetic phase diagram is determined from the temperature dependence of both uniform and staggered magnetizations in magnetic fields. We find a spin-flop transition inside the antiferromagnetic (AF) phase, whose transition field increases with increasing Kondo coupling while the AF transition temperature decreases. These results cannot be described by a simple spin Hamiltonian and are consistent with the experimental results of the field-induced transition observed in CeT2Al10 (T = Ru, Os). The anisotropic susceptibilities of CeT2Al10 are reproduced in the whole temperature range by incorporating the effects of the crystalline electric field (CEF) in the anisotropic Kondo lattice. We also propose a possible explanation for the difference in anisotropies between the magnetic susceptibility and AF moments observed in experiments.
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U2 - 10.7566/JPSJ.86.094602
DO - 10.7566/JPSJ.86.094602
M3 - Article
AN - SCOPUS:85031015322
VL - 86
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 9
M1 - 094602
ER -