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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"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0903.1270","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2009-03-06T20:51:15Z","cross_cats_sorted":[],"title_canon_sha256":"ae95ff0f1cb6bba9fbfd5ed17edf9897f3bffc2014d797166f987120cdc56212","abstract_canon_sha256":"4eca930bdb6fee875b910b38568b2a92bdba21ac827fb2ff88421763bd3f234d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:36.746178Z","signature_b64":"7ekz1QNI0JH0Bn8/iAnE77YBhTLcrO+EgqTg8eRtzCC/GhkUUTIE4qsJOQ8fM4FLXa1TL86crsSRf5dAo6w7DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1e77b9ad3add19090967007a7d75982574bbe005fb552d1e79103805e007308","last_reissued_at":"2026-05-18T02:14:36.745703Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:36.745703Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"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. 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