{"paper":{"title":"Itinerant antiferromagnetism in the antagonistic pair compound Y$_4$Co$_3$Ag","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Y4Co3Ag orders antiferromagnetically at 14.9 K with small itinerant moments below 0.2 μB per Co in a quasi-one-dimensional chain structure.","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Joanna M. Blawat, John Singleton, Nao Furukawa, Paul C. Canfield, Rafaela F. S. Penacchio, Raquel A. Ribeiro, Sergey L. Bud'ko, S\\'ergio L. Morelh\\~ao, Tyler J. Slade, Zhouqi Li","submitted_at":"2026-05-15T00:20:46Z","abstract_excerpt":"Low dimensional crystallographic motifs have long been associated with desirable physical properties. The confinement of electrons to low dimensions is thought to enhance quantum fluctuations and may promote correlated phenomena. Here, using the antagonistic pair concept, we add Y to the immiscible Co-Ag pair to discover Y$_4$Co$_3$Ag. This compound adopts a monoclinic $I$2/$m$ structure consisting of Y channels that are filled by one-dimensional zigzag and hexagonal Co chains, which extend along the crystallographic $b$-axis with no nearest neighbor contacts between Co and Ag atoms. Transport"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Taken together, our results imply the presence of small, itinerant moments and strong fluctuations in Y4Co3Ag, suggesting that Y4Co3Ag may be a promising candidate material to investigate itinerant magnetic interactions in a quasi-one dimensional system.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The interpretation that the small ordered moment (<0.2 μB/Co), low entropy release (~0.1 R ln2), and lack of Co-Ag contacts together establish itinerant rather than localized magnetism rests on the assumption that standard magnetization and specific-heat data are sufficient to distinguish these regimes without direct probes such as neutron diffraction or band-structure calculations.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Y4Co3Ag is a newly made quasi-one-dimensional compound that orders antiferromagnetically at 14.9 K with small itinerant cobalt moments and strong fluctuations.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Y4Co3Ag orders antiferromagnetically at 14.9 K with small itinerant moments below 0.2 μB per Co in a quasi-one-dimensional chain structure.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"c553f5a5ba9aa2e94e3ee376b18fa4de5760a03bd37324d4fb4dcc61605f65f1"},"source":{"id":"2605.15495","kind":"arxiv","version":1},"verdict":{"id":"22f4e407-9671-4aca-833b-c2d328e0f345","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T15:57:16.352077Z","strongest_claim":"Taken together, our results imply the presence of small, itinerant moments and strong fluctuations in Y4Co3Ag, suggesting that Y4Co3Ag may be a promising candidate material to investigate itinerant magnetic interactions in a quasi-one dimensional system.","one_line_summary":"Y4Co3Ag is a newly made quasi-one-dimensional compound that orders antiferromagnetically at 14.9 K with small itinerant cobalt moments and strong fluctuations.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The interpretation that the small ordered moment (<0.2 μB/Co), low entropy release (~0.1 R ln2), and lack of Co-Ag contacts together establish itinerant rather than localized magnetism rests on the assumption that standard magnetization and specific-heat data are sufficient to distinguish these regimes without direct probes such as neutron diffraction or band-structure calculations.","pith_extraction_headline":"Y4Co3Ag orders antiferromagnetically at 14.9 K with small itinerant moments below 0.2 μB per Co in a quasi-one-dimensional chain 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density wave in the intermetallic oxides","work_id":"8e1368c8-8ec1-4ced-a394-16a1f22025b4","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2001,"title":"Journal of Crystal Growth , volume=","work_id":"3711d120-7127-4c8f-bd83-867c03bf5e0f","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"LSP Industrial Ceramics, Inc. , title =","work_id":"39b268ea-8717-46da-bd29-17d026a639ae","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2019,"title":"Reports on Progress in Physics , volume=","work_id":"64e97a11-8d11-4522-ad63-30e544fef69f","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2016,"title":"Philosophical magazine , 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