Antiferromagnetic Order and Magnetic Frustration in the Honeycomb Heavy-Fermion System Ce(Pt₁₋ₓdₓ)₆Al₃: ²⁷Al and ¹⁹⁵Pt NMR Studies
Year: 2025
Type: article
Abstract: Heavy-fermion systems with magnetic frustration offer a rich platform for investigating the interplay among Kondo screening, magnetic frustration, and quantum criticality. We report comprehensive ²⁷Al and ¹⁹⁵Pt nuclear magnetic resonance measurements on polycrystalline Ce(Pt₁₋ₓdₓ)₆Al₃ (x = 0, 0.1, 0.2, and 0.3). For x = 0, the Knight shift, linewidth, and nuclear spin–lattice relaxation rate reveal a paramagnetic heavy-fermion ground state persisting down to 0.1 K, characterized by a coherence temperature T[coh] ≃ 15 K. Substituting Pd induces antiferromagnetic order at T[N] ≃ 3.5 K, while suppressing T[coh]. Comparison between x = 0.1 and 0.3 reveals a crossover from itinerant spin-density-wave antiferromagnetism to more localized-moment antiferromagnetism, indicating a shift toward the localized side of the Doniach phase diagram. These findings establish Ce(Pt₁₋ₓdₓ)₆Al₃ as a tunable platform to explore the competition between Kondo screening and magnetic frustration.
Authors: Kitagawa, Shunsaku, Hori, Fumiya, Ishida, Kenji, Oishi, Ryohei, Shimura, Yasuyuki, Onimaru, Takahiro, Takabatake, Toshiro
Institutions: Kyoto University, Hiroshima University
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7113455468
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