{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:LVR7RD44UWAZTHI4ZHJXTZVXA3","short_pith_number":"pith:LVR7RD44","schema_version":"1.0","canonical_sha256":"5d63f88f9ca581999d1cc9d379e6b706d3c82564231c978a8fef384a1c273b74","source":{"kind":"arxiv","id":"1507.02711","version":1},"attestation_state":"computed","paper":{"title":"Validity of the N\\'{e}el-Arrhenius model for highly anisotropic Co_xFe_{3-x}O_4 nanoparticles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A.Ibarra, A.Mayoral, C. Marquina, E. Lima Jr., G. F. Goya, M. R. Ibarra, T.E. Torres","submitted_at":"2015-07-09T20:52:25Z","abstract_excerpt":"We report a systematic study on the structural and magnetic properties of Co_{x}Fe_{3-x}O_{4} magnetic nanoparticles with sizes between $5$ to $25$ nm, prepared by thermal decomposition of Fe(acac)_{3} and Co(acac)_{2}. The large magneto-crystalline anisotropy of the synthesized particles resulted in high blocking temperatures ($42$ K \\leqq $T_B$ $\\leqq 345$ K for $5 \\leqq$ d $\\leqq 13$ nm ) and large coercive fields ($H_C \\approxeq 1600$ kA/m for $T = 5$ K). The smallest particles ($<d>=5$ nm) revealed the existence of a magnetically hard, spin-disordered surface. The thermal dependence of st"},"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":"1507.02711","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-07-09T20:52:25Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"bfced9e7ff8351ebc86d629f4967e56c6be6c9b6d8114ed0cc75334adfcf6765","abstract_canon_sha256":"b0b96eb8ec054c634d458c6331b3ffbca50c7a60045323c9cdd2b340f31124c9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:18.133154Z","signature_b64":"4bYmtK4ie2swqIikO/C1TTjmf8+8pD84/iaJAYIrF8KglNw3LhzazOXsCBkl68B8Elkwdch/Su3B2iJcBVMIDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5d63f88f9ca581999d1cc9d379e6b706d3c82564231c978a8fef384a1c273b74","last_reissued_at":"2026-05-18T01:26:18.132566Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:18.132566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Validity of the N\\'{e}el-Arrhenius model for highly anisotropic Co_xFe_{3-x}O_4 nanoparticles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A.Ibarra, A.Mayoral, C. Marquina, E. Lima Jr., G. F. Goya, M. R. Ibarra, T.E. Torres","submitted_at":"2015-07-09T20:52:25Z","abstract_excerpt":"We report a systematic study on the structural and magnetic properties of Co_{x}Fe_{3-x}O_{4} magnetic nanoparticles with sizes between $5$ to $25$ nm, prepared by thermal decomposition of Fe(acac)_{3} and Co(acac)_{2}. The large magneto-crystalline anisotropy of the synthesized particles resulted in high blocking temperatures ($42$ K \\leqq $T_B$ $\\leqq 345$ K for $5 \\leqq$ d $\\leqq 13$ nm ) and large coercive fields ($H_C \\approxeq 1600$ kA/m for $T = 5$ K). The smallest particles ($<d>=5$ nm) revealed the existence of a magnetically hard, spin-disordered surface. The thermal dependence of st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02711","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1507.02711","created_at":"2026-05-18T01:26:18.132646+00:00"},{"alias_kind":"arxiv_version","alias_value":"1507.02711v1","created_at":"2026-05-18T01:26:18.132646+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.02711","created_at":"2026-05-18T01:26:18.132646+00:00"},{"alias_kind":"pith_short_12","alias_value":"LVR7RD44UWAZ","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_16","alias_value":"LVR7RD44UWAZTHI4","created_at":"2026-05-18T12:29:29.992203+00:00"},{"alias_kind":"pith_short_8","alias_value":"LVR7RD44","created_at":"2026-05-18T12:29:29.992203+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3","json":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3.json","graph_json":"https://pith.science/api/pith-number/LVR7RD44UWAZTHI4ZHJXTZVXA3/graph.json","events_json":"https://pith.science/api/pith-number/LVR7RD44UWAZTHI4ZHJXTZVXA3/events.json","paper":"https://pith.science/paper/LVR7RD44"},"agent_actions":{"view_html":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3","download_json":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3.json","view_paper":"https://pith.science/paper/LVR7RD44","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1507.02711&json=true","fetch_graph":"https://pith.science/api/pith-number/LVR7RD44UWAZTHI4ZHJXTZVXA3/graph.json","fetch_events":"https://pith.science/api/pith-number/LVR7RD44UWAZTHI4ZHJXTZVXA3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3/action/storage_attestation","attest_author":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3/action/author_attestation","sign_citation":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3/action/citation_signature","submit_replication":"https://pith.science/pith/LVR7RD44UWAZTHI4ZHJXTZVXA3/action/replication_record"}},"created_at":"2026-05-18T01:26:18.132646+00:00","updated_at":"2026-05-18T01:26:18.132646+00:00"}