{"paper":{"title":"Conditions for the Invar effect in Fe$_{1-x}A_{x}$ ($A={\\rm Pt},{\\rm Ni}$)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"F. Liot","submitted_at":"2014-03-18T11:33:17Z","abstract_excerpt":"We present a necessary condition under which a collinear ferromagnet Fe$_{1-x}A_{x}$ ($A={\\rm Pt},{\\rm Ni}$) with disordered face-centered-cubic structure exhibits the Invar effect. The condition involves the rate at which the fraction of Fe moments that are antiferromagnetically aligned with the magnetization fluctuates as the system is heated, $dx^{{\\rm Fe}\\downarrow}/dT$. Another contributing factor is the magnetostructural coupling $\\kappa=-(1/V)(\\partial V / \\partial x^{{\\rm Fe}\\downarrow})_{T}$, where the volume $V(T, x^{{\\rm Fe}\\downarrow})$ corresponds to a homogeneous ferromagnetic st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.4411","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"}