{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:7AP4FVWKIVRGF7QUYH3NJ4CNHN","short_pith_number":"pith:7AP4FVWK","canonical_record":{"source":{"id":"1406.5488","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-06-20T18:52:25Z","cross_cats_sorted":[],"title_canon_sha256":"dbe75f371c4af09589911323009b41299b9ef8941c493830c203d029de23e465","abstract_canon_sha256":"67b5f0f7d04c5fec62e7d7773e5963e230a636cb5aae67742f93960f92c0a4f8"},"schema_version":"1.0"},"canonical_sha256":"f81fc2d6ca456262fe14c1f6d4f04d3b44f981ed676fadf6bf2e7d850b129a2d","source":{"kind":"arxiv","id":"1406.5488","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.5488","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"arxiv_version","alias_value":"1406.5488v1","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.5488","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"pith_short_12","alias_value":"7AP4FVWKIVRG","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"7AP4FVWKIVRGF7QU","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"7AP4FVWK","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:7AP4FVWKIVRGF7QUYH3NJ4CNHN","target":"record","payload":{"canonical_record":{"source":{"id":"1406.5488","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-06-20T18:52:25Z","cross_cats_sorted":[],"title_canon_sha256":"dbe75f371c4af09589911323009b41299b9ef8941c493830c203d029de23e465","abstract_canon_sha256":"67b5f0f7d04c5fec62e7d7773e5963e230a636cb5aae67742f93960f92c0a4f8"},"schema_version":"1.0"},"canonical_sha256":"f81fc2d6ca456262fe14c1f6d4f04d3b44f981ed676fadf6bf2e7d850b129a2d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:03.447038Z","signature_b64":"J8VznSoCWAS50gPNLKcMv5wSGQQ1LbNX9vYIo69grDftaltM9auBgIwFaaRJHnZJx6FHNdRL99ICF0NrRFY6DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f81fc2d6ca456262fe14c1f6d4f04d3b44f981ed676fadf6bf2e7d850b129a2d","last_reissued_at":"2026-05-18T01:25:03.446286Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:03.446286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.5488","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":"2026-05-18T01:25:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4hHospcaVKltpCYUpVaafm9+Zgu76Dads2h3fl9HfR0wVXXY0cNdnw9AWFRmaxAZSvYC9EeEmHc3FV+fV8BuAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:24:24.678298Z"},"content_sha256":"dc569be0bdf6c551742dc179ccff5d7514756035dcf11ef0efd0eb806f11efe4","schema_version":"1.0","event_id":"sha256:dc569be0bdf6c551742dc179ccff5d7514756035dcf11ef0efd0eb806f11efe4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:7AP4FVWKIVRGF7QUYH3NJ4CNHN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Linear magnetoelectricity at room temperature in perovskite superlattices by design","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Craig J. Fennie, Hena Das, Saurabh Ghosh","submitted_at":"2014-06-20T18:52:25Z","abstract_excerpt":"Discovering materials that display a linear magnetoelectric effect at room temperature is challenge. Such materials could facilitate novel devices based on the electric-field control of magnetism. Here we present simple, chemically intuitive design rules to identify a new class of bulk magnetoelectric materials based on the 'bicolor' layering of $Pnma$ ferrite perovskites, e.g., LaFeO$_3$/ LnFeO$_3$ superlattices for which Ln = lanthanide cation. We use first-principles density-functional theory calculations to confirm these ideas. Additionally, we elucidate the origin of this effect and show "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.5488","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":"2026-05-18T01:25:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UysMk0efT/SW67vzNcBcxcqC+jCGSKvMhUuH3R5Dnyed98+S3f79RtgOGOWtAASg20eORS9BeOGt1EgOSBU3Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T13:24:24.678998Z"},"content_sha256":"2f69b4ceabe542d7a73ae91d58853366eba4f8e5dbe649d6da9fa73a051f9078","schema_version":"1.0","event_id":"sha256:2f69b4ceabe542d7a73ae91d58853366eba4f8e5dbe649d6da9fa73a051f9078"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7AP4FVWKIVRGF7QUYH3NJ4CNHN/bundle.json","state_url":"https://pith.science/pith/7AP4FVWKIVRGF7QUYH3NJ4CNHN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7AP4FVWKIVRGF7QUYH3NJ4CNHN/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":"2026-05-27T13:24:24Z","links":{"resolver":"https://pith.science/pith/7AP4FVWKIVRGF7QUYH3NJ4CNHN","bundle":"https://pith.science/pith/7AP4FVWKIVRGF7QUYH3NJ4CNHN/bundle.json","state":"https://pith.science/pith/7AP4FVWKIVRGF7QUYH3NJ4CNHN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7AP4FVWKIVRGF7QUYH3NJ4CNHN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:7AP4FVWKIVRGF7QUYH3NJ4CNHN","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":"67b5f0f7d04c5fec62e7d7773e5963e230a636cb5aae67742f93960f92c0a4f8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-06-20T18:52:25Z","title_canon_sha256":"dbe75f371c4af09589911323009b41299b9ef8941c493830c203d029de23e465"},"schema_version":"1.0","source":{"id":"1406.5488","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.5488","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"arxiv_version","alias_value":"1406.5488v1","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.5488","created_at":"2026-05-18T01:25:03Z"},{"alias_kind":"pith_short_12","alias_value":"7AP4FVWKIVRG","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"7AP4FVWKIVRGF7QU","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"7AP4FVWK","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:2f69b4ceabe542d7a73ae91d58853366eba4f8e5dbe649d6da9fa73a051f9078","target":"graph","created_at":"2026-05-18T01:25:03Z","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":"Discovering materials that display a linear magnetoelectric effect at room temperature is challenge. Such materials could facilitate novel devices based on the electric-field control of magnetism. Here we present simple, chemically intuitive design rules to identify a new class of bulk magnetoelectric materials based on the 'bicolor' layering of $Pnma$ ferrite perovskites, e.g., LaFeO$_3$/ LnFeO$_3$ superlattices for which Ln = lanthanide cation. We use first-principles density-functional theory calculations to confirm these ideas. Additionally, we elucidate the origin of this effect and show ","authors_text":"Craig J. Fennie, Hena Das, Saurabh Ghosh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-06-20T18:52:25Z","title":"Linear magnetoelectricity at room temperature in perovskite superlattices by design"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.5488","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:dc569be0bdf6c551742dc179ccff5d7514756035dcf11ef0efd0eb806f11efe4","target":"record","created_at":"2026-05-18T01:25:03Z","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":"67b5f0f7d04c5fec62e7d7773e5963e230a636cb5aae67742f93960f92c0a4f8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-06-20T18:52:25Z","title_canon_sha256":"dbe75f371c4af09589911323009b41299b9ef8941c493830c203d029de23e465"},"schema_version":"1.0","source":{"id":"1406.5488","kind":"arxiv","version":1}},"canonical_sha256":"f81fc2d6ca456262fe14c1f6d4f04d3b44f981ed676fadf6bf2e7d850b129a2d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f81fc2d6ca456262fe14c1f6d4f04d3b44f981ed676fadf6bf2e7d850b129a2d","first_computed_at":"2026-05-18T01:25:03.446286Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:03.446286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"J8VznSoCWAS50gPNLKcMv5wSGQQ1LbNX9vYIo69grDftaltM9auBgIwFaaRJHnZJx6FHNdRL99ICF0NrRFY6DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:03.447038Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.5488","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc569be0bdf6c551742dc179ccff5d7514756035dcf11ef0efd0eb806f11efe4","sha256:2f69b4ceabe542d7a73ae91d58853366eba4f8e5dbe649d6da9fa73a051f9078"],"state_sha256":"71be1ef45b207679d8c3278b672a553ea5ad3ba21d104b615370f0bb209b4afc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3u7lnNfMkKJc8Tfg+rhe4pIi5oH7mRP4vaNavMxepU15i6uiVl6ge/6gRxH+u1qREnxzn5Z6+oeR2zaA44/sBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T13:24:24.681687Z","bundle_sha256":"c27c16d306e8ebcc07119f538ce3a15bd1f20cd645d926b0a87798d73672e54d"}}