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arXiv · 2608.04946

Complex field-induced magnetic phases and anisotropic magnetotransport in off-stoichiometric CeCuBi2

Vikas Chahar·Shivam Rathod·Sneh·Lipika·Shobha Singh·Balwant Singh Chauhan·Subhadeep Bej·Weida Yin·Yin-Chen Huang·Rie Y. Umetsu·Ratnamala Chatterjee·Kaustuv Manna
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Abstract

We report a detailed study on the structural, angle-dependent magnetic and magnetotransport properties of highly anisotropic off-stoichiometric CeCuBi2 single crystals. Our results reveal CeCuBi2 as an anisotropic Kondo antiferromagnet exhibiting complex field-induced magnetic behavior and unusual magnetotransport properties. Magnetic susceptibility and specific heat measurements reveal antiferromagnetic (AFM) ordering below TN = 14 K with strong anisotropy and weak heavy-fermion behavior. Electrical transport measurements show highly anisotropic resistivity and a broad hump around 47 K, indicative of Kondo-driven heavy-fermion behavior. Magnetization measurements reveal multiple field-induced metamagnetic phases, while AC susceptibility measurements indicate slow spin dynamics and spin-glass-like behavior in intermediate field-induced magnetic states. Furthermore, we observe large and strongly anisotropic magneto transport responses, including room-temperature magnetoresistance of approximately 22% at 300 K and 9 T and butterfly-like anisotropic magnetoresistance with AMR values reaching approximately 10.9%. These results highlight a strong interplay among Kondo correlations, magnetic anisotropy, and field-tunable spin configurations, making CeCuBi2 a possible platform for exploring correlated and anisotropic quantum phenomena.

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Vikas Chahar, Shivam Rathod, Sneh, Lipika, Shobha Singh, Balwant Singh Chauhan, Subhadeep Bej, Weida Yin, Yin-Chen Huang, Rie Y. Umetsu, Ratnamala Chatterjee, Kaustuv Manna. 2026-08-05. Complex field-induced magnetic phases and anisotropic magnetotransport in off-stoichiometric CeCuBi2. https://arxiv.org/abs/2608.04946

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