{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:GBRMB3YW7JO62WHSBQDFJBX5FJ","short_pith_number":"pith:GBRMB3YW","schema_version":"1.0","canonical_sha256":"3062c0ef16fa5ded58f20c065486fd2a482da5509e98094f84bca290d42b99f5","source":{"kind":"arxiv","id":"2210.04138","version":1},"attestation_state":"computed","paper":{"title":"Origin of negative electrocaloric effect in Pnma-type antiferroelectric perovskites","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bin Xu, Jorge \\'I\\~niguez, L. Bellaiche, Ningbo Fan","submitted_at":"2022-10-09T02:06:29Z","abstract_excerpt":"Anomalous electrocaloric effect (ECE) with decreasing temperature upon application of an electric field is known to occur in antiferroelectrics (AFEs), and previous understanding refers to the field-induced canting of electric dipoles if there is no phase transitions. Here, we use a first-principle-based method to study the ECE in Nd-substituted BiFeO3 (BNFO) perovskite solid solutions, which has the Pnma-type AFE ground state. We demonstrate another scenario to achieve and explain anomalous ECE, emphasizing that explicit consideration of octahedral tiltings is indispensable for a correct unde"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2210.04138","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-10-09T02:06:29Z","cross_cats_sorted":[],"title_canon_sha256":"22b977a3b5a8ae63a3413c5015f2b8e2d8c46b41f83e9e4f97f06dc844987b93","abstract_canon_sha256":"9983750fcc0b4e5c475faa117ccb2c3403164f052b590255952dc248bce08b5c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:28:29.700145Z","signature_b64":"pR8mnpOrr58do8l/0cQyx3NeYCp0OvYNh2vYXjvFlLbIQgiV5EcPjTJfop9ATW2aJONxpJRDnMvIgBuQmBzLDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3062c0ef16fa5ded58f20c065486fd2a482da5509e98094f84bca290d42b99f5","last_reissued_at":"2026-07-05T05:28:29.699772Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:28:29.699772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Origin of negative electrocaloric effect in Pnma-type antiferroelectric perovskites","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bin Xu, Jorge \\'I\\~niguez, L. Bellaiche, Ningbo Fan","submitted_at":"2022-10-09T02:06:29Z","abstract_excerpt":"Anomalous electrocaloric effect (ECE) with decreasing temperature upon application of an electric field is known to occur in antiferroelectrics (AFEs), and previous understanding refers to the field-induced canting of electric dipoles if there is no phase transitions. Here, we use a first-principle-based method to study the ECE in Nd-substituted BiFeO3 (BNFO) perovskite solid solutions, which has the Pnma-type AFE ground state. We demonstrate another scenario to achieve and explain anomalous ECE, emphasizing that explicit consideration of octahedral tiltings is indispensable for a correct unde"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2210.04138","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/2210.04138/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2210.04138","created_at":"2026-07-05T05:28:29.699822+00:00"},{"alias_kind":"arxiv_version","alias_value":"2210.04138v1","created_at":"2026-07-05T05:28:29.699822+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2210.04138","created_at":"2026-07-05T05:28:29.699822+00:00"},{"alias_kind":"pith_short_12","alias_value":"GBRMB3YW7JO6","created_at":"2026-07-05T05:28:29.699822+00:00"},{"alias_kind":"pith_short_16","alias_value":"GBRMB3YW7JO62WHS","created_at":"2026-07-05T05:28:29.699822+00:00"},{"alias_kind":"pith_short_8","alias_value":"GBRMB3YW","created_at":"2026-07-05T05:28:29.699822+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ","json":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ.json","graph_json":"https://pith.science/api/pith-number/GBRMB3YW7JO62WHSBQDFJBX5FJ/graph.json","events_json":"https://pith.science/api/pith-number/GBRMB3YW7JO62WHSBQDFJBX5FJ/events.json","paper":"https://pith.science/paper/GBRMB3YW"},"agent_actions":{"view_html":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ","download_json":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ.json","view_paper":"https://pith.science/paper/GBRMB3YW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2210.04138&json=true","fetch_graph":"https://pith.science/api/pith-number/GBRMB3YW7JO62WHSBQDFJBX5FJ/graph.json","fetch_events":"https://pith.science/api/pith-number/GBRMB3YW7JO62WHSBQDFJBX5FJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ/action/storage_attestation","attest_author":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ/action/author_attestation","sign_citation":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ/action/citation_signature","submit_replication":"https://pith.science/pith/GBRMB3YW7JO62WHSBQDFJBX5FJ/action/replication_record"}},"created_at":"2026-07-05T05:28:29.699822+00:00","updated_at":"2026-07-05T05:28:29.699822+00:00"}