{"paper":{"title":"Magnetism in a family of $S = 1$ square lattice antiferromagnets Ni$X_2$(pyz)$_2$ ($X = $ Cl, Br, I, NCS; pyz = pyrazine)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A. Ardavan, C. J. Villa, F. Foronda, F. L. Pratt, F. Xiao, H. E. Tran, J. Bendix, J. Brambleby, J. Liu, J. L. Manson, J. Singleton, J. S. M\\\"oller, K. E. Carreiro, K. H. Stone, K. Wierschem, M. R. Lees, P. A. Goddard, P. J. Baker, P. W. Stephens, R. C. Williams, S. Ghannadzadeh, S. H. Lapidus, S. J. Blundell, T. J. Woods, T. Lancaster, Y. Kohama","submitted_at":"2014-10-12T10:35:24Z","abstract_excerpt":"The crystal structures of Ni$X_2$(pyz)$_2$ ($X$ = Cl (\\textbf{1}), Br (\\textbf{2}), I (\\textbf{3}) and NCS (\\textbf{4})) were determined at 298~K by synchrotron X-ray powder diffraction. All four compounds consist of two-dimensional (2D) square arrays self-assembled from octahedral NiN$_4$$X_2$ units that are bridged by pyz ligands. The 2D layered motifs displayed by \\textbf{1}-\\textbf{4} are relevant to bifluoride-bridged [Ni(HF$_2$)(pyz)$_2$]$Z$F$_6$ ($Z$ = P, Sb) which also possess the same 2D layers. In contrast, terminal $X$ ligands occupy axial positions in \\textbf{1}-\\textbf{4} and caus"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.3077","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}