{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:SSCLIBEJMW537SWHAHWQ5MYB33","short_pith_number":"pith:SSCLIBEJ","canonical_record":{"source":{"id":"1812.03666","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-12-10T08:04:07Z","cross_cats_sorted":[],"title_canon_sha256":"8b2b782647e62e0974c23503ec72b14c0405f3d0037f7230fb81691802893e7f","abstract_canon_sha256":"ef7ce3e292270c5ceb9ffa5546d5341a9f78dc4af6a1ff81864403a3cfd965e3"},"schema_version":"1.0"},"canonical_sha256":"9484b4048965bbbfcac701ed0eb301def4f451e08112da39a233d8a7aeeaf2be","source":{"kind":"arxiv","id":"1812.03666","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.03666","created_at":"2026-05-17T23:51:30Z"},{"alias_kind":"arxiv_version","alias_value":"1812.03666v1","created_at":"2026-05-17T23:51:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03666","created_at":"2026-05-17T23:51:30Z"},{"alias_kind":"pith_short_12","alias_value":"SSCLIBEJMW53","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SSCLIBEJMW537SWH","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SSCLIBEJ","created_at":"2026-05-18T12:32:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:SSCLIBEJMW537SWHAHWQ5MYB33","target":"record","payload":{"canonical_record":{"source":{"id":"1812.03666","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-12-10T08:04:07Z","cross_cats_sorted":[],"title_canon_sha256":"8b2b782647e62e0974c23503ec72b14c0405f3d0037f7230fb81691802893e7f","abstract_canon_sha256":"ef7ce3e292270c5ceb9ffa5546d5341a9f78dc4af6a1ff81864403a3cfd965e3"},"schema_version":"1.0"},"canonical_sha256":"9484b4048965bbbfcac701ed0eb301def4f451e08112da39a233d8a7aeeaf2be","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:30.618607Z","signature_b64":"CbRstydKKb7xFgH25VAweW2vFGkEEVgz56XGmDMxV205eFPKHhuNiNdLyqiL/jweKW48wVlEsNheetbhdv9mCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9484b4048965bbbfcac701ed0eb301def4f451e08112da39a233d8a7aeeaf2be","last_reissued_at":"2026-05-17T23:51:30.618083Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:30.618083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.03666","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":"2026-05-17T23:51:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HdCqxTimz6OeWyUvzBh0IqrxK+BgXEoqVYGjfH7u5Ehg+No1CASlYzOz4o6h89g6VAInOsrOYUiXTmsn3mvIAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T08:08:16.708034Z"},"content_sha256":"a966d122bf6f898cd322d3bb859f18dabcc1f02e4af1d3ffa3a6bada3d39239b","schema_version":"1.0","event_id":"sha256:a966d122bf6f898cd322d3bb859f18dabcc1f02e4af1d3ffa3a6bada3d39239b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:SSCLIBEJMW537SWHAHWQ5MYB33","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the magnetoelastic and magnetoelectric couplings across the antiferromagnetic transition in multiferroic BiFeO3","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Brahim Dkhil, Charles Paillard, Gwena\\\"elle Vaudel, Laurent Bellaiche, Mariusz Lejman, Michel Viret, Nicolas Guiblin, Pascal Ruello, Vincent Juv\\'e, Vitalyi E. Gusev","submitted_at":"2018-12-10T08:04:07Z","abstract_excerpt":"Clear anomalies in the lattice thermal expansion (deviation from linear variation) and elastic properties (softening of the sound velocity) at the antiferromagnetic-to-paramagnetic transition are observed in the prototypical multiferroic BiFeO3 using a combination of picosecond acoustic pump-probe and high-temperature X-ray diffraction experiments. Similar anomalies are also evidenced using first-principles calculations supporting our experimental findings. Those calculations in addition to a simple Landau-like model we also developed allow to understand the elastic softening and lattice chang"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03666","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":"2026-05-17T23:51:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"45BNmW+YuB1SVZ3Z7QLeAd/VFBc+o6jbI/3cZDJ9jQYCoU99WSlYJdhe52D+phLi197xORxvw22RSVGIMxiYAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T08:08:16.708734Z"},"content_sha256":"b99f100bac9e787dd616421ed8916120676991554ae900867787777cba2ae4c1","schema_version":"1.0","event_id":"sha256:b99f100bac9e787dd616421ed8916120676991554ae900867787777cba2ae4c1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SSCLIBEJMW537SWHAHWQ5MYB33/bundle.json","state_url":"https://pith.science/pith/SSCLIBEJMW537SWHAHWQ5MYB33/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SSCLIBEJMW537SWHAHWQ5MYB33/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":"2026-05-23T08:08:16Z","links":{"resolver":"https://pith.science/pith/SSCLIBEJMW537SWHAHWQ5MYB33","bundle":"https://pith.science/pith/SSCLIBEJMW537SWHAHWQ5MYB33/bundle.json","state":"https://pith.science/pith/SSCLIBEJMW537SWHAHWQ5MYB33/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SSCLIBEJMW537SWHAHWQ5MYB33/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:SSCLIBEJMW537SWHAHWQ5MYB33","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":"ef7ce3e292270c5ceb9ffa5546d5341a9f78dc4af6a1ff81864403a3cfd965e3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-12-10T08:04:07Z","title_canon_sha256":"8b2b782647e62e0974c23503ec72b14c0405f3d0037f7230fb81691802893e7f"},"schema_version":"1.0","source":{"id":"1812.03666","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.03666","created_at":"2026-05-17T23:51:30Z"},{"alias_kind":"arxiv_version","alias_value":"1812.03666v1","created_at":"2026-05-17T23:51:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03666","created_at":"2026-05-17T23:51:30Z"},{"alias_kind":"pith_short_12","alias_value":"SSCLIBEJMW53","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SSCLIBEJMW537SWH","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SSCLIBEJ","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:b99f100bac9e787dd616421ed8916120676991554ae900867787777cba2ae4c1","target":"graph","created_at":"2026-05-17T23:51:30Z","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":"Clear anomalies in the lattice thermal expansion (deviation from linear variation) and elastic properties (softening of the sound velocity) at the antiferromagnetic-to-paramagnetic transition are observed in the prototypical multiferroic BiFeO3 using a combination of picosecond acoustic pump-probe and high-temperature X-ray diffraction experiments. Similar anomalies are also evidenced using first-principles calculations supporting our experimental findings. Those calculations in addition to a simple Landau-like model we also developed allow to understand the elastic softening and lattice chang","authors_text":"Brahim Dkhil, Charles Paillard, Gwena\\\"elle Vaudel, Laurent Bellaiche, Mariusz Lejman, Michel Viret, Nicolas Guiblin, Pascal Ruello, Vincent Juv\\'e, Vitalyi E. Gusev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-12-10T08:04:07Z","title":"On the magnetoelastic and magnetoelectric couplings across the antiferromagnetic transition in multiferroic BiFeO3"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03666","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:a966d122bf6f898cd322d3bb859f18dabcc1f02e4af1d3ffa3a6bada3d39239b","target":"record","created_at":"2026-05-17T23:51:30Z","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":"ef7ce3e292270c5ceb9ffa5546d5341a9f78dc4af6a1ff81864403a3cfd965e3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-12-10T08:04:07Z","title_canon_sha256":"8b2b782647e62e0974c23503ec72b14c0405f3d0037f7230fb81691802893e7f"},"schema_version":"1.0","source":{"id":"1812.03666","kind":"arxiv","version":1}},"canonical_sha256":"9484b4048965bbbfcac701ed0eb301def4f451e08112da39a233d8a7aeeaf2be","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9484b4048965bbbfcac701ed0eb301def4f451e08112da39a233d8a7aeeaf2be","first_computed_at":"2026-05-17T23:51:30.618083Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:30.618083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CbRstydKKb7xFgH25VAweW2vFGkEEVgz56XGmDMxV205eFPKHhuNiNdLyqiL/jweKW48wVlEsNheetbhdv9mCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:30.618607Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.03666","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a966d122bf6f898cd322d3bb859f18dabcc1f02e4af1d3ffa3a6bada3d39239b","sha256:b99f100bac9e787dd616421ed8916120676991554ae900867787777cba2ae4c1"],"state_sha256":"04d68c40d3fdc6d3179357a518c7a10946cadc9b524baf5607d184cff3ff6b64"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lhLsQoTvTDv46DyfZGhR7dfBrHSUsVGSxNRbDPVw1OIbdCw7Rzlm9YT9YbRe18mbIxXUELQqtxRphoVlLNaHCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T08:08:16.712036Z","bundle_sha256":"18d42ace43c71214aecbd3c3ca3654344e1038c750c4fd31514db6aa3f714131"}}