{"paper":{"title":"High-frequency EPR study on Cu$_4$Cu- and Co$_4$Co-metallacrown complexes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"C. Koo, E. Rentschler, J. Butscher, J. Park, R. Klingeler","submitted_at":"2019-03-10T18:20:59Z","abstract_excerpt":"High-frequency/high-field electron paramagnetic resonance studies on two homo-nuclear 12-MC-4 metallacrown complexes Cu$_4$Cu and Co$_4$Co are presented. For Cu$_4$Cu, our data imply axial-type $g$-anisotropy with $g_{x}$ = 2.03 $\\pm$ 0.01, $g_{y}$ = 2.04 $\\pm$ 0.01, and $g_{z}$ = 2.23 $\\pm$ 0.01, yielding $g=2.10 \\pm 0.02$. No significant zero field splitting (ZFS) of the ground state mode is observed. In Co$_4$Co, we find a m$_S$ = $\\pm$3/2 ground state with $g=2.66$. The data suggest large anisotropy $D$ of negative sign."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.04031","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"}