{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:A4ZK4NXUBYZESDFEFBJLQ2R7IE","short_pith_number":"pith:A4ZK4NXU","canonical_record":{"source":{"id":"1203.0461","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-02T13:57:29Z","cross_cats_sorted":[],"title_canon_sha256":"2bd1ce8139f7c5e0c50e0c42ebe5cdbe3c4aa44f6cc61868220bc656be35c8c4","abstract_canon_sha256":"124f102474669b7bed2009084e61248afd9cc04aad26956917560b598c2ed973"},"schema_version":"1.0"},"canonical_sha256":"0732ae36f40e32490ca42852b86a3f41156c3379fc05afa8e563157151ad1071","source":{"kind":"arxiv","id":"1203.0461","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0461","created_at":"2026-05-18T04:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0461v1","created_at":"2026-05-18T04:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0461","created_at":"2026-05-18T04:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"A4ZK4NXUBYZE","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"A4ZK4NXUBYZESDFE","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"A4ZK4NXU","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:A4ZK4NXUBYZESDFEFBJLQ2R7IE","target":"record","payload":{"canonical_record":{"source":{"id":"1203.0461","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-02T13:57:29Z","cross_cats_sorted":[],"title_canon_sha256":"2bd1ce8139f7c5e0c50e0c42ebe5cdbe3c4aa44f6cc61868220bc656be35c8c4","abstract_canon_sha256":"124f102474669b7bed2009084e61248afd9cc04aad26956917560b598c2ed973"},"schema_version":"1.0"},"canonical_sha256":"0732ae36f40e32490ca42852b86a3f41156c3379fc05afa8e563157151ad1071","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:01:00.648640Z","signature_b64":"IwVWDhdjpxHxwYBzj2p9S+9niJpFEfoNtSeDZJJNETlr/J89vWgLULZ16oG63c6jnJ1lu4gFsrto7j5geW8iDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0732ae36f40e32490ca42852b86a3f41156c3379fc05afa8e563157151ad1071","last_reissued_at":"2026-05-18T04:01:00.647895Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:01:00.647895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.0461","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":"2026-05-18T04:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eOh84wfwdsRm6hNYdLk/BifmwVhHchO679r/k9H1cQXQmm+I4SydUQdPcLjyf0XQ/iMY184t22JQC2Z7BQurBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T09:43:42.002202Z"},"content_sha256":"b68c8d8befe1f4234dcad2ae4a79dff41c80778902d5320cb97fc0f6ff4fb109","schema_version":"1.0","event_id":"sha256:b68c8d8befe1f4234dcad2ae4a79dff41c80778902d5320cb97fc0f6ff4fb109"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:A4ZK4NXUBYZESDFEFBJLQ2R7IE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Origin of the Enhanced Polarization in La and Mg Co-substituted BiFeO3 Thin Film during the Fatigue Process","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Amit Kumar, John Wang, Kaiyang Zeng, Qingqing Ke, Xiaojie Lou","submitted_at":"2012-03-02T13:57:29Z","abstract_excerpt":"We have studied the polarization fatigue of La and Mg co-substituted BiFeO3 thin film, where a polarization peak is observed during the fatigue process. The origin of such anomalous behavior is analyzed on the basis of the defect evolution using temperature-dependent impedance spectroscopy. It shows that the motion of oxygen vacancies (VO..) is associated with a lower energy barrier, accompanied by the injection of electrons into the film during the fatigue process. A qualitative model is proposed to explain the fatigue behavior, which involves the modification of the Schottky barrier upon the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0461","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":"2026-05-18T04:01:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+O5YVN4aGu0jpRx6gzVJtCAw6pz7M3kVMde232eoI8VuVoJ4XXTsi/CFqiimyf/6O1GPGuDvDe4Q10zUflHuCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T09:43:42.002570Z"},"content_sha256":"97fbddd7e11b6a50dfceaf089cd7143238313470199dedfedc52b33b8ed9b200","schema_version":"1.0","event_id":"sha256:97fbddd7e11b6a50dfceaf089cd7143238313470199dedfedc52b33b8ed9b200"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A4ZK4NXUBYZESDFEFBJLQ2R7IE/bundle.json","state_url":"https://pith.science/pith/A4ZK4NXUBYZESDFEFBJLQ2R7IE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A4ZK4NXUBYZESDFEFBJLQ2R7IE/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":"2026-06-02T09:43:42Z","links":{"resolver":"https://pith.science/pith/A4ZK4NXUBYZESDFEFBJLQ2R7IE","bundle":"https://pith.science/pith/A4ZK4NXUBYZESDFEFBJLQ2R7IE/bundle.json","state":"https://pith.science/pith/A4ZK4NXUBYZESDFEFBJLQ2R7IE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A4ZK4NXUBYZESDFEFBJLQ2R7IE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:A4ZK4NXUBYZESDFEFBJLQ2R7IE","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":"124f102474669b7bed2009084e61248afd9cc04aad26956917560b598c2ed973","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-02T13:57:29Z","title_canon_sha256":"2bd1ce8139f7c5e0c50e0c42ebe5cdbe3c4aa44f6cc61868220bc656be35c8c4"},"schema_version":"1.0","source":{"id":"1203.0461","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0461","created_at":"2026-05-18T04:01:00Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0461v1","created_at":"2026-05-18T04:01:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0461","created_at":"2026-05-18T04:01:00Z"},{"alias_kind":"pith_short_12","alias_value":"A4ZK4NXUBYZE","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"A4ZK4NXUBYZESDFE","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"A4ZK4NXU","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:97fbddd7e11b6a50dfceaf089cd7143238313470199dedfedc52b33b8ed9b200","target":"graph","created_at":"2026-05-18T04:01:00Z","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":"We have studied the polarization fatigue of La and Mg co-substituted BiFeO3 thin film, where a polarization peak is observed during the fatigue process. The origin of such anomalous behavior is analyzed on the basis of the defect evolution using temperature-dependent impedance spectroscopy. It shows that the motion of oxygen vacancies (VO..) is associated with a lower energy barrier, accompanied by the injection of electrons into the film during the fatigue process. A qualitative model is proposed to explain the fatigue behavior, which involves the modification of the Schottky barrier upon the","authors_text":"Amit Kumar, John Wang, Kaiyang Zeng, Qingqing Ke, Xiaojie Lou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-02T13:57:29Z","title":"Origin of the Enhanced Polarization in La and Mg Co-substituted BiFeO3 Thin Film during the Fatigue Process"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0461","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:b68c8d8befe1f4234dcad2ae4a79dff41c80778902d5320cb97fc0f6ff4fb109","target":"record","created_at":"2026-05-18T04:01:00Z","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":"124f102474669b7bed2009084e61248afd9cc04aad26956917560b598c2ed973","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-02T13:57:29Z","title_canon_sha256":"2bd1ce8139f7c5e0c50e0c42ebe5cdbe3c4aa44f6cc61868220bc656be35c8c4"},"schema_version":"1.0","source":{"id":"1203.0461","kind":"arxiv","version":1}},"canonical_sha256":"0732ae36f40e32490ca42852b86a3f41156c3379fc05afa8e563157151ad1071","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0732ae36f40e32490ca42852b86a3f41156c3379fc05afa8e563157151ad1071","first_computed_at":"2026-05-18T04:01:00.647895Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:01:00.647895Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IwVWDhdjpxHxwYBzj2p9S+9niJpFEfoNtSeDZJJNETlr/J89vWgLULZ16oG63c6jnJ1lu4gFsrto7j5geW8iDw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:01:00.648640Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.0461","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b68c8d8befe1f4234dcad2ae4a79dff41c80778902d5320cb97fc0f6ff4fb109","sha256:97fbddd7e11b6a50dfceaf089cd7143238313470199dedfedc52b33b8ed9b200"],"state_sha256":"f5c2622a8fc30c42d0fa6e51afb533de493112c61d63b05348f8a9e78c3c4ae8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kaizi+va0BzeM2z77UvbeAjgjAeFuG6zKLgUVE7SQByoE1RwwUi057Pgb/DNbZgjScvxsN8CQQ+uGDcYYRlYDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T09:43:42.004471Z","bundle_sha256":"4101f914ef018c7e9bfb7491d434332f008f074eade6af7fea8a847b7cf9868f"}}