{"paper":{"title":"First-principles study of Exchange Interaction in Ising-type Multiferroic Ca$_3$CoMnO$_6$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"(2) Institute of Science, Engineering, Fumiyuki Ishii (2), Kanazawa University, Kanazawa University), Miho Nishida (1), Mineo Saito (2) ((1) Natural Science, Technology","submitted_at":"2014-04-15T09:03:35Z","abstract_excerpt":"We perform first-principles calculations of multiferroic Ca$_3$CoMnO$_6$ and evaluate the exchange coupling constants using the Green's function method. We clarify the effect of intra-chain and inter-chain exchange interactions on magnetic stability. We find that inter-chain exchange coupling constants are antiferromagnetic and that there are geometrical frustrations in the triangular lattices of magnetic chains in Ca$_3$CoMnO$_6$. The magnetic transition temperature is evaluated using effective Hamiltonian with calculated exchange coupling constants. We obtain the transition temperature 5.80K"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.3849","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"}