{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:5RFNLT6HCUML6L3F67WH3YB2WK","short_pith_number":"pith:5RFNLT6H","canonical_record":{"source":{"id":"1001.1997","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-01-12T20:28:23Z","cross_cats_sorted":[],"title_canon_sha256":"cfb1bc76edaa26221258d2f13c510d99772e1139c6656cf77b2d75d63cce2e19","abstract_canon_sha256":"1d3ed7a37a6282533fd51ee03c62d8e1586c7456e8d943b23cc6ce9cc507bc43"},"schema_version":"1.0"},"canonical_sha256":"ec4ad5cfc71518bf2f65f7ec7de03ab2ad9cf191311605dfef56f8dbe5524b1d","source":{"kind":"arxiv","id":"1001.1997","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.1997","created_at":"2026-05-18T02:09:55Z"},{"alias_kind":"arxiv_version","alias_value":"1001.1997v1","created_at":"2026-05-18T02:09:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.1997","created_at":"2026-05-18T02:09:55Z"},{"alias_kind":"pith_short_12","alias_value":"5RFNLT6HCUML","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"5RFNLT6HCUML6L3F","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"5RFNLT6H","created_at":"2026-05-18T12:26:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:5RFNLT6HCUML6L3F67WH3YB2WK","target":"record","payload":{"canonical_record":{"source":{"id":"1001.1997","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-01-12T20:28:23Z","cross_cats_sorted":[],"title_canon_sha256":"cfb1bc76edaa26221258d2f13c510d99772e1139c6656cf77b2d75d63cce2e19","abstract_canon_sha256":"1d3ed7a37a6282533fd51ee03c62d8e1586c7456e8d943b23cc6ce9cc507bc43"},"schema_version":"1.0"},"canonical_sha256":"ec4ad5cfc71518bf2f65f7ec7de03ab2ad9cf191311605dfef56f8dbe5524b1d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:55.349800Z","signature_b64":"UeGK7/fSFOfai/PflsXJd4tJhRw94Vl95ahjLLCG3Ejxqs27memIOtqChGRl8BHfIIIV50Dq74M1ZuxlXiKiDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec4ad5cfc71518bf2f65f7ec7de03ab2ad9cf191311605dfef56f8dbe5524b1d","last_reissued_at":"2026-05-18T02:09:55.349072Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:55.349072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1001.1997","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":"2026-05-18T02:09:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UkhW04FJA89wIZ0tZNRgUkmUNLiufr1y8LtKbIiMI5AWUIFQiz2QT8EztlC6c60xiM13zUmIF3Rfv0afHFEEDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:21:10.347424Z"},"content_sha256":"038d3bb9ab6dc89b7fbd77371e4faa13e1194b127611769a23f1e3961e585d39","schema_version":"1.0","event_id":"sha256:038d3bb9ab6dc89b7fbd77371e4faa13e1194b127611769a23f1e3961e585d39"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:5RFNLT6HCUML6L3F67WH3YB2WK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phonon Spectroscopy Near Phase Transition Temperatures in Multferroic BiFeO3 Epitaxial Thin Films","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"J.F. Scott, R. Palai, R.S. Katiyar","submitted_at":"2010-01-12T20:28:23Z","abstract_excerpt":"We report a Raman scattering investigation of multiferroic bismuth ferrite BiFeO3 epitaxial (c-axis oriented) thin films from -192 to 1000C. Phonon anomalies have been observed in three temperature regions: in the gamma-phase from 930C to 950C; at ~370C, Neel temperature (TN), and at ~123C, due to a phase transition of unknown type (magnetic or structural). An attempt has been made to understand the origin of the weak phonon-magnon coupling and the dynamics of the phase sequence. The disappearance of several Raman modes at ~820C (Tc) is compatible with the known structural phase transition and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.1997","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":"2026-05-18T02:09:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h+oSUq2u6s/n1xEI64BZy8p5FpZ7Kx76S20yl7s/qtCxzQ1TS0NwgBEjjYOk4izmcKLYZ/CXOn/0v4Jqve0kBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:21:10.348113Z"},"content_sha256":"33777be42aaa0da790b627c98717a8c1efa50de3f0b6f88205c36fc2caf3086b","schema_version":"1.0","event_id":"sha256:33777be42aaa0da790b627c98717a8c1efa50de3f0b6f88205c36fc2caf3086b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5RFNLT6HCUML6L3F67WH3YB2WK/bundle.json","state_url":"https://pith.science/pith/5RFNLT6HCUML6L3F67WH3YB2WK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5RFNLT6HCUML6L3F67WH3YB2WK/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":"2026-05-25T15:21:10Z","links":{"resolver":"https://pith.science/pith/5RFNLT6HCUML6L3F67WH3YB2WK","bundle":"https://pith.science/pith/5RFNLT6HCUML6L3F67WH3YB2WK/bundle.json","state":"https://pith.science/pith/5RFNLT6HCUML6L3F67WH3YB2WK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5RFNLT6HCUML6L3F67WH3YB2WK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:5RFNLT6HCUML6L3F67WH3YB2WK","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":"1d3ed7a37a6282533fd51ee03c62d8e1586c7456e8d943b23cc6ce9cc507bc43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-01-12T20:28:23Z","title_canon_sha256":"cfb1bc76edaa26221258d2f13c510d99772e1139c6656cf77b2d75d63cce2e19"},"schema_version":"1.0","source":{"id":"1001.1997","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.1997","created_at":"2026-05-18T02:09:55Z"},{"alias_kind":"arxiv_version","alias_value":"1001.1997v1","created_at":"2026-05-18T02:09:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.1997","created_at":"2026-05-18T02:09:55Z"},{"alias_kind":"pith_short_12","alias_value":"5RFNLT6HCUML","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"5RFNLT6HCUML6L3F","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"5RFNLT6H","created_at":"2026-05-18T12:26:04Z"}],"graph_snapshots":[{"event_id":"sha256:33777be42aaa0da790b627c98717a8c1efa50de3f0b6f88205c36fc2caf3086b","target":"graph","created_at":"2026-05-18T02:09:55Z","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 report a Raman scattering investigation of multiferroic bismuth ferrite BiFeO3 epitaxial (c-axis oriented) thin films from -192 to 1000C. Phonon anomalies have been observed in three temperature regions: in the gamma-phase from 930C to 950C; at ~370C, Neel temperature (TN), and at ~123C, due to a phase transition of unknown type (magnetic or structural). An attempt has been made to understand the origin of the weak phonon-magnon coupling and the dynamics of the phase sequence. The disappearance of several Raman modes at ~820C (Tc) is compatible with the known structural phase transition and","authors_text":"J.F. Scott, R. Palai, R.S. Katiyar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-01-12T20:28:23Z","title":"Phonon Spectroscopy Near Phase Transition Temperatures in Multferroic BiFeO3 Epitaxial Thin Films"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.1997","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":"sha256:038d3bb9ab6dc89b7fbd77371e4faa13e1194b127611769a23f1e3961e585d39","target":"record","created_at":"2026-05-18T02:09:55Z","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":"1d3ed7a37a6282533fd51ee03c62d8e1586c7456e8d943b23cc6ce9cc507bc43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-01-12T20:28:23Z","title_canon_sha256":"cfb1bc76edaa26221258d2f13c510d99772e1139c6656cf77b2d75d63cce2e19"},"schema_version":"1.0","source":{"id":"1001.1997","kind":"arxiv","version":1}},"canonical_sha256":"ec4ad5cfc71518bf2f65f7ec7de03ab2ad9cf191311605dfef56f8dbe5524b1d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec4ad5cfc71518bf2f65f7ec7de03ab2ad9cf191311605dfef56f8dbe5524b1d","first_computed_at":"2026-05-18T02:09:55.349072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:55.349072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UeGK7/fSFOfai/PflsXJd4tJhRw94Vl95ahjLLCG3Ejxqs27memIOtqChGRl8BHfIIIV50Dq74M1ZuxlXiKiDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:55.349800Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.1997","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:038d3bb9ab6dc89b7fbd77371e4faa13e1194b127611769a23f1e3961e585d39","sha256:33777be42aaa0da790b627c98717a8c1efa50de3f0b6f88205c36fc2caf3086b"],"state_sha256":"41eddae40772301a565add51914808172ab30bd172362d2c915c55ed24ed47c2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mf+/eX11qYAd5LCkC5wNL1aQweG13DQpLgGEzVWB59oVIE79m76xPHSBy3tk8HjaEPeKDIynNKwdYgabIC+TAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T15:21:10.351999Z","bundle_sha256":"5f860c2a5a98334432ff90b2f0b8df0dbe68fccdd09d1b2bbfee404662b6e85c"}}