2019/12/18 by Brinda Kuthanazhi, Kuthanazhi, Brinda, Na Hyun Jo +7
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.1912.08896
openalex publication_date 2019/12/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the synthesis of CeBi single crystals out of Bi self flux and a systematic study of the magnetic and transport properties with varying temperature and applied magnetic fields. From these R(T,H) and M(T,H) data we could assemble the field-temperature (H-T) phase diagram for CeBi and visualize the three dimensional M-T-H surface. In the phase diagram, we identify regions with well defined magnetization values, and identify a new phase region. The magnetoresistance (MR) in the low temperature regime shows, above 6~T a power-law, non-saturated behavior with large MR (∼ 3×105 % at 2~K and 13.95~T), along with Shubnikov-de Haas oscillations. With increasing temperatures, MR decreases, and then becomes negative for T\gtrsim 10~K. This crossover in MR seems to be unrelated to any specific magnetic or metamagnetic transitions, but rather is associated with changing from a low-temperature normal metal regime with little or no scattering from the Ce3+ moments and an anomalously large MR, to an increased scattering from local Ce moments and a negative MR as temperature increases.