Year: 2025
Type: article
Abstract: We investigate both the nonmagnetic and magnetic ordered phases of CeCoSi using Landau theory. Our analysis predicts three successive phase transitions at zero magnetic field. A quadrupole order parameter that emerges below $T_0=12$ K acts as a weak symmetry-breaking field on the antiferromagnetic ordering below $T_{\rm N}=9.4$ K, leading to two-stage magnetic transitions. In the higher-temperature antiferromagnetic phase within the range $T_{\rm s2}=8~{\rm K}
Author: Takayuki Ishitobi
Institutions: Japan Atomic Energy Agency, Advanced Science Research Center
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Award: 四極子自由度に内在する新奇物性の開拓
OpenAlex ID: W4411590535