Hidden frustration in the triangular-lattice antiferromagnet NdCd3⁢P3

Chamorro, Juan R.; Alvarado, Steven J. Gomez; Rout, Dibyata; Schwarz, Sarah; Scheie, Allen; Pokharel, Ganesh; Kolesnikov, Alexander I.; Keller, Lukas; Wilson, Stephen D.

doi:10.1103/2dcv-nkz7

Title: Hidden frustration in the triangular-lattice antiferromagnet NdCd₃⁢P₃

Journal Article · Mon Oct 27 00:00:00 UTC 2025 · Physical Review Materials

DOI: https://doi.org/10.1103/2dcv-nkz7 · OSTI ID:3015214

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University of California, Santa Barbara, CA (United States); Carnegie Mellon University, Pittsburgh, PA (United States)
University of California, Santa Barbara, CA (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
University of California, Santa Barbara, CA (United States); University of West Georgia, Carrollton, GA (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Paul Scherrer Institute, Villigen-PSI (Switzerland)

We report a study of the magnetic ground state and crystal electric field (CEF) scheme in the triangular-lattice antiferromagnet NdCd₃⁢P₃. Combined neutron scattering, magnetization, and heat capacity measurements demonstrate that the Nd³⁺ moments occupying the triangular lattice in this material harbor hidden signs of frustration not detected in typical Curie-Weiss-based parametrization of the frustration index (𝑓 = Θ_𝐶⁢𝑊/𝑇_𝑁). This is evidenced by a zero-field splitting of the Kramers' ground state and first excited state doublets at temperatures far in excess of 𝑇_𝑁 as well as signatures of low-energy fluctuations for 𝑇 ≫ 𝑇_𝑁. As a result, a suppression of the zero-field ordered moment relative to its field saturation value is observed, and the impacts of this magnetic frustration as well as the coexisting bond frustration in the CdP honeycomb network on the physical properties of NdCd₃⁢P3 are discussed.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of California, Santa Barbara, CA (United States)

Sponsoring Organization:: NSF MPS-Ascend Postdoctoral Fellowship; National Science Foundation (NSF); Q-AMASE-i program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC05-00OR22725; SC0017752

OSTI ID:: 3015214

Journal Information:: Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 10 Vol. 9; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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