{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:FPIFTN2XFCFWSP6VGQ3T53XXCR","short_pith_number":"pith:FPIFTN2X","canonical_record":{"source":{"id":"1210.2510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-09T07:30:25Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"6dfbd51d5a6333d0f225a36f0202fb7070607472aacbbef8c436b66cef4b46ae","abstract_canon_sha256":"6fb74addc8ccc20e8cead314e03e01f93f50d78640afa7bd4e6269976559b46c"},"schema_version":"1.0"},"canonical_sha256":"2bd059b757288b693fd534373eeef7146326d37b5412f4f3718c9ec46946c78d","source":{"kind":"arxiv","id":"1210.2510","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2510","created_at":"2026-05-18T03:43:41Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2510v1","created_at":"2026-05-18T03:43:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2510","created_at":"2026-05-18T03:43:41Z"},{"alias_kind":"pith_short_12","alias_value":"FPIFTN2XFCFW","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"FPIFTN2XFCFWSP6V","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"FPIFTN2X","created_at":"2026-05-18T12:27:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:FPIFTN2XFCFWSP6VGQ3T53XXCR","target":"record","payload":{"canonical_record":{"source":{"id":"1210.2510","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-09T07:30:25Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"6dfbd51d5a6333d0f225a36f0202fb7070607472aacbbef8c436b66cef4b46ae","abstract_canon_sha256":"6fb74addc8ccc20e8cead314e03e01f93f50d78640afa7bd4e6269976559b46c"},"schema_version":"1.0"},"canonical_sha256":"2bd059b757288b693fd534373eeef7146326d37b5412f4f3718c9ec46946c78d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:43:41.323668Z","signature_b64":"KurJ+RGx1v9BkW8kkm2PvawH+vzV2HJhDROZ7XLWlR3TmcFid81OJ9dFWaeHTjvrDhH5H0hQqJi9DlEW1PztDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2bd059b757288b693fd534373eeef7146326d37b5412f4f3718c9ec46946c78d","last_reissued_at":"2026-05-18T03:43:41.322985Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:43:41.322985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.2510","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:43:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bio3FARu/rU0pogkRpVri0xDKsFkISRhrDroTHkid0diluOwgA35k4rYpwkgel7RD9NNsiI0X6yO2p2oq/tgDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T05:18:10.051682Z"},"content_sha256":"5893c13b5a952b33c5782abd2c00d00f9b6c13ee4b74357af3bc66e02403c993","schema_version":"1.0","event_id":"sha256:5893c13b5a952b33c5782abd2c00d00f9b6c13ee4b74357af3bc66e02403c993"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:FPIFTN2XFCFWSP6VGQ3T53XXCR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Giant exchange bias and ferromagnetism in the CoO shell of Co/CoO-MgO core-shell 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":"C. N. Ge, E. Pellegrin, W. Q. Zou, Xiangang Wan, Y. W. Du, Z. Hu","submitted_at":"2012-10-09T07:30:25Z","abstract_excerpt":"Using magnetron sputtering, we produced a series of Co/CoO-MgO nanoparticles on Si(100) substrates. High-resolution transmission electron microscopy (HRTEM) image shows that small isolated Co-clusters (core) covered with CoO (shells) with a size of a few nm embedded in a MgO matrix. Resistivity as a function of Co atomic ratio exhibits a distinct percolation threshold with a sharp decrease around 69% Co content. Across the threshold, the resistivity drops about 7 orders of magnitude. For a sample at this percolation critical threshold, we have observed a giant exchange bias field HE=2460 Oe at"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2510","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:43:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YcVC43l52oxqP6pbL50w2kQeC249JPtFTkyFRMdogQzCC5qa2ywB62JtvsIBUq6ca0RgH3tiynJQBOisZe60AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T05:18:10.052039Z"},"content_sha256":"6914052e9a640df145663609c9e9aa5b0bd0e8e26c47c86723dbcbc4cdb745c7","schema_version":"1.0","event_id":"sha256:6914052e9a640df145663609c9e9aa5b0bd0e8e26c47c86723dbcbc4cdb745c7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FPIFTN2XFCFWSP6VGQ3T53XXCR/bundle.json","state_url":"https://pith.science/pith/FPIFTN2XFCFWSP6VGQ3T53XXCR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FPIFTN2XFCFWSP6VGQ3T53XXCR/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":"2026-06-08T05:18:10Z","links":{"resolver":"https://pith.science/pith/FPIFTN2XFCFWSP6VGQ3T53XXCR","bundle":"https://pith.science/pith/FPIFTN2XFCFWSP6VGQ3T53XXCR/bundle.json","state":"https://pith.science/pith/FPIFTN2XFCFWSP6VGQ3T53XXCR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FPIFTN2XFCFWSP6VGQ3T53XXCR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:FPIFTN2XFCFWSP6VGQ3T53XXCR","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":"6fb74addc8ccc20e8cead314e03e01f93f50d78640afa7bd4e6269976559b46c","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-09T07:30:25Z","title_canon_sha256":"6dfbd51d5a6333d0f225a36f0202fb7070607472aacbbef8c436b66cef4b46ae"},"schema_version":"1.0","source":{"id":"1210.2510","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2510","created_at":"2026-05-18T03:43:41Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2510v1","created_at":"2026-05-18T03:43:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2510","created_at":"2026-05-18T03:43:41Z"},{"alias_kind":"pith_short_12","alias_value":"FPIFTN2XFCFW","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"FPIFTN2XFCFWSP6V","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"FPIFTN2X","created_at":"2026-05-18T12:27:06Z"}],"graph_snapshots":[{"event_id":"sha256:6914052e9a640df145663609c9e9aa5b0bd0e8e26c47c86723dbcbc4cdb745c7","target":"graph","created_at":"2026-05-18T03:43:41Z","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"},"paper":{"abstract_excerpt":"Using magnetron sputtering, we produced a series of Co/CoO-MgO nanoparticles on Si(100) substrates. High-resolution transmission electron microscopy (HRTEM) image shows that small isolated Co-clusters (core) covered with CoO (shells) with a size of a few nm embedded in a MgO matrix. Resistivity as a function of Co atomic ratio exhibits a distinct percolation threshold with a sharp decrease around 69% Co content. Across the threshold, the resistivity drops about 7 orders of magnitude. For a sample at this percolation critical threshold, we have observed a giant exchange bias field HE=2460 Oe at","authors_text":"C. N. Ge, E. Pellegrin, W. Q. Zou, Xiangang Wan, Y. W. Du, Z. Hu","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-09T07:30:25Z","title":"Giant exchange bias and ferromagnetism in the CoO shell of Co/CoO-MgO core-shell nanoparticles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2510","kind":"arxiv","version":1},"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":"sha256:5893c13b5a952b33c5782abd2c00d00f9b6c13ee4b74357af3bc66e02403c993","target":"record","created_at":"2026-05-18T03:43:41Z","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":"6fb74addc8ccc20e8cead314e03e01f93f50d78640afa7bd4e6269976559b46c","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-10-09T07:30:25Z","title_canon_sha256":"6dfbd51d5a6333d0f225a36f0202fb7070607472aacbbef8c436b66cef4b46ae"},"schema_version":"1.0","source":{"id":"1210.2510","kind":"arxiv","version":1}},"canonical_sha256":"2bd059b757288b693fd534373eeef7146326d37b5412f4f3718c9ec46946c78d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2bd059b757288b693fd534373eeef7146326d37b5412f4f3718c9ec46946c78d","first_computed_at":"2026-05-18T03:43:41.322985Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:43:41.322985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KurJ+RGx1v9BkW8kkm2PvawH+vzV2HJhDROZ7XLWlR3TmcFid81OJ9dFWaeHTjvrDhH5H0hQqJi9DlEW1PztDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:43:41.323668Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.2510","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5893c13b5a952b33c5782abd2c00d00f9b6c13ee4b74357af3bc66e02403c993","sha256:6914052e9a640df145663609c9e9aa5b0bd0e8e26c47c86723dbcbc4cdb745c7"],"state_sha256":"c3a52be32ebcb247bc87716e242e65c76f553caea27bf81c404b7c18421f9f4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YORYBi/J/QNDPOGc0UkOmyUYOQdRBr3GcIPlq7E3z7MpjwBAYsoMIuk9DhZEgKdMgGj+XkuEz2GV9LYRPUjwBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T05:18:10.054013Z","bundle_sha256":"fd0d9ca8ff8528b3977764d28827858f799050f932f2c7c153abf59b8a063e2c"}}