Abstract
We present a detailed study of magnetization, resistivity, heat capacity, and x-ray and neutron powder diffraction measurements performed on single crystals of nonstoichiometric CeAuBi2, Au deficiency 18%, a strongly correlated antiferromagnet with Néel temperature TN = 13.2 K. Field-dependent magnetization measurements reveal a large magnetic anisotropy at low temperatures with an easy axis along the crystallographic c axis, in which direction a spin-flop transition exhibits strong features in magnetization, specific heat, and resistivity at Hc = 75 kOe. The constructed temperature-field phase diagram connects this transition to the suppression of magnetic order, which evolves from a second-order nature into a first-order transition that bifurcates at the spin-flop transition into three transitions below 1 K. The smoothed nature of the metamagnetic transitions in nonstoichiometric CeAuBi2 is well described by an Ising model with weak quenched disorder, suggesting that the presence of Au vacancies is sufficient to smear the complex metamagnetic behavior and tune the critical behavior of magnetic order.
Recommended Citation
H. Hodovanets and H. Kim and T. Metz and Y. Nakajima and C. J. Eckberg and K. Wang and J. Yong and S. R. Saha and D. Graf and N. P. Butch and T. Vojta and J. Paglione, "Magnetic Field Tuned Magnetic Order and Metamagnetic Criticality in Nonstoichiometric CeAuBi2," Physical Review B, vol. 113, no. 5, article no. 054432, American Physical Society, Feb 2026.
The definitive version is available at https://doi.org/10.1103/1QCC-BY7Y
Department(s)
Physics
International Standard Serial Number (ISSN)
2469-9969; 2469-9950
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2026 American Physical Society, All rights reserved.
Publication Date
20 Feb 2026
