{"paper":{"title":"Superconductivity and Field-Induced Magnetism in SrFe_1.75Co_0.25As_2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. Amato, A. Kwadrin, A. Leithe-Jasper, A. Maisuradze, H.-H. Klauss, H. Luetkens, H. Maeter, H. Rosner, R. Khasanov, W. Schnelle","submitted_at":"2009-03-06T20:51:15Z","abstract_excerpt":"Using muon-spin rotation, we studied the in-plane (\\lambda_ab) and the out of plane (\\lambda_c) magnetic field penetration depth in SrFe_1.75Co_0.25As_2 (T_c=13.3 K). Both \\lambda_ab(T) and \\lambda_c(T) are consistent with the presence of two superconducting gaps with the gap to T_c ratios 2\\Delta/k_BT_c=7.2 and 2.7. The penetration depth anisotropy \\gamma_\\lambda=\\lambda_c/\\lambda_ab increases from \\gamma_\\lambda=2.1 at T_c to 2.7 at 1.6 K. The mean internal field in the superconducting state increases with decreasing temperature, just opposite to the diamagnetic response seen in magnetizatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.1270","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"}