{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:DKBDZSZ7EWPCETEBHU633DQ7I4","short_pith_number":"pith:DKBDZSZ7","canonical_record":{"source":{"id":"2404.06876","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-04-10T10:01:44Z","cross_cats_sorted":[],"title_canon_sha256":"d3f4637d11b1dbee8174e8bb1794c42a77f8f5c7fe9b2461b9ff5c73efc56da2","abstract_canon_sha256":"d7cc68461ef5bd79c6f08deb244e4edcd3aee80d9cca69371822dc29892a7aa4"},"schema_version":"1.0"},"canonical_sha256":"1a823ccb3f259e224c813d3dbd8e1f47071deb9a49148573fb5d2698c9a1b086","source":{"kind":"arxiv","id":"2404.06876","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.06876","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"arxiv_version","alias_value":"2404.06876v2","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.06876","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"pith_short_12","alias_value":"DKBDZSZ7EWPC","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"pith_short_16","alias_value":"DKBDZSZ7EWPCETEB","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"pith_short_8","alias_value":"DKBDZSZ7","created_at":"2026-07-05T08:07:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:DKBDZSZ7EWPCETEBHU633DQ7I4","target":"record","payload":{"canonical_record":{"source":{"id":"2404.06876","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-04-10T10:01:44Z","cross_cats_sorted":[],"title_canon_sha256":"d3f4637d11b1dbee8174e8bb1794c42a77f8f5c7fe9b2461b9ff5c73efc56da2","abstract_canon_sha256":"d7cc68461ef5bd79c6f08deb244e4edcd3aee80d9cca69371822dc29892a7aa4"},"schema_version":"1.0"},"canonical_sha256":"1a823ccb3f259e224c813d3dbd8e1f47071deb9a49148573fb5d2698c9a1b086","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:07:16.793350Z","signature_b64":"U0gKLXDzhQzeeEe9WQo9sU+ZCfPUILbllHZUm5W3IRjjUgxUtLd3R5sIxBRercL+cP2MxDGuLRP9mvv8eZKTAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a823ccb3f259e224c813d3dbd8e1f47071deb9a49148573fb5d2698c9a1b086","last_reissued_at":"2026-07-05T08:07:16.792888Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:07:16.792888Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2404.06876","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:07:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AwUEF9EIHhIxdOt+OL12TTTYkj44DNc0QsBlDndUK7N53vVu2k9my3EfSvk/cSSYa1RV945lSWnKdrhAiv8SDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T19:10:17.140966Z"},"content_sha256":"8c5ab6c87403d30c924b76a34a7987f8570e4791f3bdbc40fd222fcdd6b861e4","schema_version":"1.0","event_id":"sha256:8c5ab6c87403d30c924b76a34a7987f8570e4791f3bdbc40fd222fcdd6b861e4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:DKBDZSZ7EWPCETEBHU633DQ7I4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Size-induced Exchange Bias in Single-phase CoO Nanoparticles","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Dinesh Kumar Shukla, Divya Sharma, Gunadhor Singh Okram, Ram Janay Chaudhary, Sudip Pal, Vikash Sharma","submitted_at":"2024-04-10T10:01:44Z","abstract_excerpt":"We report exchange bias (EB) in single-phase CoO nanoparticles, where two magnetic phases naturally emerge as the crystallite size decreases from 34.6 to 10.8 nm. The N\\'eel temperature (TN) associated with antiferromagnetic ordering decreases monotonically with the reduction in crystallite size, highlighting the significant influence of size effects. The 34.6 nm nanoparticles exhibit magnetization irreversibility between zero field cooled (ZFC) and field-cooled (FC) states below TN. This irreversibility appears well above TN with further reduction in size, resulting in the absence of true par"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.06876","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2404.06876/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:07:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kXvs/TwT4I4JbFiqBLdT/2pM1q/lTD1j8qMRxESGpV+EERFcjRTH3dfNHsAEooorg8HhGChE0BbcEl7U4yuOCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T19:10:17.141351Z"},"content_sha256":"0a9e7dbc41aa9521f2a915a75d0b5304334910c0284a4575fe578e4e971f7633","schema_version":"1.0","event_id":"sha256:0a9e7dbc41aa9521f2a915a75d0b5304334910c0284a4575fe578e4e971f7633"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DKBDZSZ7EWPCETEBHU633DQ7I4/bundle.json","state_url":"https://pith.science/pith/DKBDZSZ7EWPCETEBHU633DQ7I4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DKBDZSZ7EWPCETEBHU633DQ7I4/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-06T19:10:17Z","links":{"resolver":"https://pith.science/pith/DKBDZSZ7EWPCETEBHU633DQ7I4","bundle":"https://pith.science/pith/DKBDZSZ7EWPCETEBHU633DQ7I4/bundle.json","state":"https://pith.science/pith/DKBDZSZ7EWPCETEBHU633DQ7I4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DKBDZSZ7EWPCETEBHU633DQ7I4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:DKBDZSZ7EWPCETEBHU633DQ7I4","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d7cc68461ef5bd79c6f08deb244e4edcd3aee80d9cca69371822dc29892a7aa4","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-04-10T10:01:44Z","title_canon_sha256":"d3f4637d11b1dbee8174e8bb1794c42a77f8f5c7fe9b2461b9ff5c73efc56da2"},"schema_version":"1.0","source":{"id":"2404.06876","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.06876","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"arxiv_version","alias_value":"2404.06876v2","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.06876","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"pith_short_12","alias_value":"DKBDZSZ7EWPC","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"pith_short_16","alias_value":"DKBDZSZ7EWPCETEB","created_at":"2026-07-05T08:07:16Z"},{"alias_kind":"pith_short_8","alias_value":"DKBDZSZ7","created_at":"2026-07-05T08:07:16Z"}],"graph_snapshots":[{"event_id":"sha256:0a9e7dbc41aa9521f2a915a75d0b5304334910c0284a4575fe578e4e971f7633","target":"graph","created_at":"2026-07-05T08:07:16Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2404.06876/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report exchange bias (EB) in single-phase CoO nanoparticles, where two magnetic phases naturally emerge as the crystallite size decreases from 34.6 to 10.8 nm. The N\\'eel temperature (TN) associated with antiferromagnetic ordering decreases monotonically with the reduction in crystallite size, highlighting the significant influence of size effects. The 34.6 nm nanoparticles exhibit magnetization irreversibility between zero field cooled (ZFC) and field-cooled (FC) states below TN. This irreversibility appears well above TN with further reduction in size, resulting in the absence of true par","authors_text":"Dinesh Kumar Shukla, Divya Sharma, Gunadhor Singh Okram, Ram Janay Chaudhary, Sudip Pal, Vikash Sharma","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-04-10T10:01:44Z","title":"Size-induced Exchange Bias in Single-phase CoO Nanoparticles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.06876","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:8c5ab6c87403d30c924b76a34a7987f8570e4791f3bdbc40fd222fcdd6b861e4","target":"record","created_at":"2026-07-05T08:07:16Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d7cc68461ef5bd79c6f08deb244e4edcd3aee80d9cca69371822dc29892a7aa4","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-04-10T10:01:44Z","title_canon_sha256":"d3f4637d11b1dbee8174e8bb1794c42a77f8f5c7fe9b2461b9ff5c73efc56da2"},"schema_version":"1.0","source":{"id":"2404.06876","kind":"arxiv","version":2}},"canonical_sha256":"1a823ccb3f259e224c813d3dbd8e1f47071deb9a49148573fb5d2698c9a1b086","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a823ccb3f259e224c813d3dbd8e1f47071deb9a49148573fb5d2698c9a1b086","first_computed_at":"2026-07-05T08:07:16.792888Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:07:16.792888Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U0gKLXDzhQzeeEe9WQo9sU+ZCfPUILbllHZUm5W3IRjjUgxUtLd3R5sIxBRercL+cP2MxDGuLRP9mvv8eZKTAA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:07:16.793350Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.06876","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c5ab6c87403d30c924b76a34a7987f8570e4791f3bdbc40fd222fcdd6b861e4","sha256:0a9e7dbc41aa9521f2a915a75d0b5304334910c0284a4575fe578e4e971f7633"],"state_sha256":"c8c024a398844fb50a6062b5b4c9efd5f9f0e7eb08d146ada13b5fb3615c51f8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yzsve5M5e/OqVV2AkLOLEKqrhtWqfKovoPeoSsAh/6uTtfgqsEuL0S2nQR7xWe9DuJJ7/RHFwOZUOtn7dSEdAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T19:10:17.143251Z","bundle_sha256":"e3c0d8f8159869a96b035acfdc2d077bf9abbe084f58007477e7c60c8433a0a4"}}