2022/03/04 by Shunsaku Kitagawa, Mayu Kibune, Katsuki Kinjo +10
Materials Science · Physics and Astronomy · #Anisotropy #Antiferromagnetism #Condensed matter physics #Iron-based superconductors research #Knight shift #Magnetic Properties of Alloys #Magnetic susceptibility #Materials science #Physics #Rare-earth and actinide compounds #Spin (aerodynamics) #Superconductivity #Thermodynamics #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.7566/jpsj.91.043702
published as J. Phys. Soc. Jpn. 91, 043702 (2022) · 5 pages, 4 figures
openalex publication_date 2022/03/04 · openalex created_date 2022/03/05 · arxiv created 2022/03/07 · arxiv updated 2022/03/08 · openalex updated_date 2026/08/06
We performed 75As-NMR measurements to investigate the normal-state magnetic properties of CeRh2As2, a recently-discovered heavy-fermion superconductor. The magnitude and temperature dependence of the Knight shift at the As(2) site indicate easy-plane-type magnetic anisotropy in CeRh2As2. With regard to spin fluctuations, the temperature dependence of the nuclear spin-lattice relaxation rate 1/T1 arising from the 4f electrons decreases from high-temperature constant behavior on cooling at ∼ 40~K, which is typical behavior of heavy-fermion systems. In addition, 1/T1 becomes constant at low temperatures, suggesting spatially two-dimensional antiferromagnetic fluctuations. Two-dimensional magnetic correlations in the real space are quite rare among heavy-fermion superconductors, and they may be a key factor in the unique superconducting multi-phase in CeRh2As2.