{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:BSDUZRPFNRJKQN2XWE454GW4CM","short_pith_number":"pith:BSDUZRPF","canonical_record":{"source":{"id":"0712.0736","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.other","submitted_at":"2007-12-05T14:50:15Z","cross_cats_sorted":[],"title_canon_sha256":"61e0aab0651fe2daa82e8bb7df279ca6bcdba9d898072075183c90e9352c2f10","abstract_canon_sha256":"f40cce8b92bc07615f7dd2a016115f83697db969bc952c30b85c3e6efbddbd12"},"schema_version":"1.0"},"canonical_sha256":"0c874cc5e56c52a83757b139de1adc13326ed7a538e94874069a311f0a77f562","source":{"kind":"arxiv","id":"0712.0736","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0712.0736","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"arxiv_version","alias_value":"0712.0736v1","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0712.0736","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"pith_short_12","alias_value":"BSDUZRPFNRJK","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"pith_short_16","alias_value":"BSDUZRPFNRJKQN2X","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"pith_short_8","alias_value":"BSDUZRPF","created_at":"2026-07-04T15:06:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:BSDUZRPFNRJKQN2XWE454GW4CM","target":"record","payload":{"canonical_record":{"source":{"id":"0712.0736","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.other","submitted_at":"2007-12-05T14:50:15Z","cross_cats_sorted":[],"title_canon_sha256":"61e0aab0651fe2daa82e8bb7df279ca6bcdba9d898072075183c90e9352c2f10","abstract_canon_sha256":"f40cce8b92bc07615f7dd2a016115f83697db969bc952c30b85c3e6efbddbd12"},"schema_version":"1.0"},"canonical_sha256":"0c874cc5e56c52a83757b139de1adc13326ed7a538e94874069a311f0a77f562","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:06:04.482933Z","signature_b64":"tGsLrSdUiyLN9SUnBxo0wpn0PMia5RsGugccMCCsbOlOIHVqwaAc/+8LX+ldg1BkYTbmL5ycUfgWbOVf165PDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c874cc5e56c52a83757b139de1adc13326ed7a538e94874069a311f0a77f562","last_reissued_at":"2026-07-04T15:06:04.482587Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:06:04.482587Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0712.0736","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":"2026-07-04T15:06:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fZCvXs40y8VtZxtC1SXQvmq7GuhL0enHh1NF+gvZmV0UHknCgUtQYb7GvVV1sOticdbUI/kt3QeITUiUDjulDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T08:50:46.824295Z"},"content_sha256":"e668c40658e991f13086c392dd12a8f3f651160df86dad22a274938f8b7595c9","schema_version":"1.0","event_id":"sha256:e668c40658e991f13086c392dd12a8f3f651160df86dad22a274938f8b7595c9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:BSDUZRPFNRJKQN2XWE454GW4CM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pressure-induced phase transitions in the multiferroic perovskite BiFeO3 studied by far-infrared micro-spectroscopy","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.other","authors_text":"A. Pashkin, C. A. Kuntscher, J. Kreisel, K. Rabia, R. Haumont, R. Saint-Martin, S. Frank","submitted_at":"2007-12-05T14:50:15Z","abstract_excerpt":"We present the results of pressure-dependent far-infrared reflectivity measurements on the multiferroic perovskite BiFeO3 at room temperature. The observed behavior of the infrared-active phonon modes as a funtion of pressure clearly reveals two structural phase transitions around 3.0 and 7.5 GPa, supporting the results of recent Raman and x-ray diffraction studies under pressure. Based on the pressure-dependent frequency shifts of the infrared-active phonon modes we discuss the possible character of the phase transitions."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.0736","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0712.0736/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":"2026-07-04T15:06:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bmw1lEOQiRhmgV7XdQZyYesQ2yfZ9AVlWf/ENBTyxzswG258VjOgsYZdm2+K3U3/Q+Z/hPOJfnW+Eizuvg+OCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T08:50:46.824927Z"},"content_sha256":"712d4d0739afd3b6a4ed8f6ae5e165f39eae03d2da0540de2529a323dea923d1","schema_version":"1.0","event_id":"sha256:712d4d0739afd3b6a4ed8f6ae5e165f39eae03d2da0540de2529a323dea923d1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BSDUZRPFNRJKQN2XWE454GW4CM/bundle.json","state_url":"https://pith.science/pith/BSDUZRPFNRJKQN2XWE454GW4CM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BSDUZRPFNRJKQN2XWE454GW4CM/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":"2026-08-18T08:50:46Z","links":{"resolver":"https://pith.science/pith/BSDUZRPFNRJKQN2XWE454GW4CM","bundle":"https://pith.science/pith/BSDUZRPFNRJKQN2XWE454GW4CM/bundle.json","state":"https://pith.science/pith/BSDUZRPFNRJKQN2XWE454GW4CM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BSDUZRPFNRJKQN2XWE454GW4CM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:BSDUZRPFNRJKQN2XWE454GW4CM","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":"f40cce8b92bc07615f7dd2a016115f83697db969bc952c30b85c3e6efbddbd12","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.other","submitted_at":"2007-12-05T14:50:15Z","title_canon_sha256":"61e0aab0651fe2daa82e8bb7df279ca6bcdba9d898072075183c90e9352c2f10"},"schema_version":"1.0","source":{"id":"0712.0736","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0712.0736","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"arxiv_version","alias_value":"0712.0736v1","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0712.0736","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"pith_short_12","alias_value":"BSDUZRPFNRJK","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"pith_short_16","alias_value":"BSDUZRPFNRJKQN2X","created_at":"2026-07-04T15:06:04Z"},{"alias_kind":"pith_short_8","alias_value":"BSDUZRPF","created_at":"2026-07-04T15:06:04Z"}],"graph_snapshots":[{"event_id":"sha256:712d4d0739afd3b6a4ed8f6ae5e165f39eae03d2da0540de2529a323dea923d1","target":"graph","created_at":"2026-07-04T15:06:04Z","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/0712.0736/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the results of pressure-dependent far-infrared reflectivity measurements on the multiferroic perovskite BiFeO3 at room temperature. The observed behavior of the infrared-active phonon modes as a funtion of pressure clearly reveals two structural phase transitions around 3.0 and 7.5 GPa, supporting the results of recent Raman and x-ray diffraction studies under pressure. Based on the pressure-dependent frequency shifts of the infrared-active phonon modes we discuss the possible character of the phase transitions.","authors_text":"A. Pashkin, C. A. Kuntscher, J. Kreisel, K. Rabia, R. Haumont, R. Saint-Martin, S. Frank","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.other","submitted_at":"2007-12-05T14:50:15Z","title":"Pressure-induced phase transitions in the multiferroic perovskite BiFeO3 studied by far-infrared micro-spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.0736","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:e668c40658e991f13086c392dd12a8f3f651160df86dad22a274938f8b7595c9","target":"record","created_at":"2026-07-04T15:06:04Z","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":"f40cce8b92bc07615f7dd2a016115f83697db969bc952c30b85c3e6efbddbd12","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.other","submitted_at":"2007-12-05T14:50:15Z","title_canon_sha256":"61e0aab0651fe2daa82e8bb7df279ca6bcdba9d898072075183c90e9352c2f10"},"schema_version":"1.0","source":{"id":"0712.0736","kind":"arxiv","version":1}},"canonical_sha256":"0c874cc5e56c52a83757b139de1adc13326ed7a538e94874069a311f0a77f562","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c874cc5e56c52a83757b139de1adc13326ed7a538e94874069a311f0a77f562","first_computed_at":"2026-07-04T15:06:04.482587Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:06:04.482587Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tGsLrSdUiyLN9SUnBxo0wpn0PMia5RsGugccMCCsbOlOIHVqwaAc/+8LX+ldg1BkYTbmL5ycUfgWbOVf165PDA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:06:04.482933Z","signed_message":"canonical_sha256_bytes"},"source_id":"0712.0736","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e668c40658e991f13086c392dd12a8f3f651160df86dad22a274938f8b7595c9","sha256:712d4d0739afd3b6a4ed8f6ae5e165f39eae03d2da0540de2529a323dea923d1"],"state_sha256":"fd0ba902acd6e7e6131d58d7997d919f5f085547a3b488bf84d3ac4ef7cddff0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VH80TpS4SlfmnIHmeLvFKT9Lcbu9tuJzXChykg0a3gEoP/HZyBxCAmB0B8s0AIFdw8UdBBwIatLNsJ7ht+MrCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T08:50:46.828627Z","bundle_sha256":"41806a9f4c7c7c74037d6b919deaba0ccbd611efd90596e5f700e0c0d783a350"}}