{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:PVKXLU7IOSQZZAAYKGPL3QBDE4","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":"c6909d35c2ba31c380b144299a7f28651644fe6c7ddfa34a84c05ff48b65e47b","cross_cats_sorted":["cond-mat.str-el"],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2007-10-29T09:22:20Z","title_canon_sha256":"b8e6342a9ea1934158f15262307cd231bd0c698aa526c74a47ab5abc3759b90b"},"schema_version":"1.0","source":{"id":"0710.5705","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0710.5705","created_at":"2026-05-18T03:46:48Z"},{"alias_kind":"arxiv_version","alias_value":"0710.5705v1","created_at":"2026-05-18T03:46:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.5705","created_at":"2026-05-18T03:46:48Z"},{"alias_kind":"pith_short_12","alias_value":"PVKXLU7IOSQZ","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"PVKXLU7IOSQZZAAY","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"PVKXLU7I","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:696d548564cb01185db55b3e05c7f13be48a25ce88677dccec21540f0ae6912b","target":"graph","created_at":"2026-05-18T03:46:48Z","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":"$La_{0.7}Ca_{0.3}MnO_3$ samples were prepared in nano- and polycrystalline forms by sol-gel and solid state reaction methods, respectively, and structurally characterized by synchrotron X-ray diffraction. The magnetic properties determined by ac susceptibility and dc magnetization measurements are discussed. The magnetocaloric effect in this nanocrystalline manganite is spread over a broader temperature interval than in the polycrystalline case. The relative cooling power of the poly- and nanocrystalline manganites is used to evaluate a possible application for magnetic cooling below room temp","authors_text":"J.F. Fagnard, M. Ausloos, M. Pekala, Ph. Vanderbemden, V. Drozd","cross_cats":["cond-mat.str-el"],"headline":"","license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2007-10-29T09:22:20Z","title":"Magnetocaloric effect in nano- and polycrystalline manganite $La_{0.7}Ca_{0.3}MnO_3$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.5705","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:e87517ec01d15c8185982a21b1df54f55e4a9358763b4839922cf48f29ba31d9","target":"record","created_at":"2026-05-18T03:46:48Z","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":"c6909d35c2ba31c380b144299a7f28651644fe6c7ddfa34a84c05ff48b65e47b","cross_cats_sorted":["cond-mat.str-el"],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2007-10-29T09:22:20Z","title_canon_sha256":"b8e6342a9ea1934158f15262307cd231bd0c698aa526c74a47ab5abc3759b90b"},"schema_version":"1.0","source":{"id":"0710.5705","kind":"arxiv","version":1}},"canonical_sha256":"7d5575d3e874a19c8018519ebdc023273ca7e39fb132d54bd3d2d5a6aa1f6713","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7d5575d3e874a19c8018519ebdc023273ca7e39fb132d54bd3d2d5a6aa1f6713","first_computed_at":"2026-05-18T03:46:48.039112Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:46:48.039112Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kOoPI8jpFnOOPdAYKcd7KK5B4HaeZFHg3SdZjRyLHzopXIkL+0JulVZF8v02l3SL/AxW7718eNPydT2K+bBrAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:46:48.039946Z","signed_message":"canonical_sha256_bytes"},"source_id":"0710.5705","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e87517ec01d15c8185982a21b1df54f55e4a9358763b4839922cf48f29ba31d9","sha256:696d548564cb01185db55b3e05c7f13be48a25ce88677dccec21540f0ae6912b"],"state_sha256":"5fd38d94670f33c594ea16f77978ac2210a9f5511e532540f1c360aabbeb1981"}