{"paper":{"title":"Weak ferromagnetic order breaking the threefold rotational symmetry of the underlying kagom\\'e lattice in CdCu$_3$(OH)$_6$(NO$_3$)$_2\\cdot$H$_2$O","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Daisuke Nishio-Hamane, Ryutaro Okuma, Takeshi Yajima, Tsuyoshi Okubo, Zenji Hiroi","submitted_at":"2017-03-28T00:41:08Z","abstract_excerpt":"Novel magnetic phases are expected to occur in highly frustrated spin systems. Here we study the structurally perfect kagom\\'e antiferromagnet CdCu$_3$(OH)$_6$(NO$_3$)$_2\\cdot$H$_2$O by magnetization, magnetic torque, and heat capacity measurements using single crystals.An antiferromagnetic order accompanied by a small spontaneous magnetization that surprisingly is confined in the kagom\\'e plane sets in at $T_\\mathrm{N}\\approx$4 K, well below the nearest-neighbor exchange interaction $J / k_B$ = 45 K.This suggests that a unique $\\bf q = 0$ type 120$^\\circ$ spin structure with \"negative\" (downw"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.09357","kind":"arxiv","version":1},"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"}