{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:GCKKWHHLE27M63YK7KB6UZ7VFH","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":"83451798ce879e7ac3dc558ea2c540dfe32aef7a970daeeb642ff9501d76d9f8","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-01-30T21:13:08Z","title_canon_sha256":"0760511fe951feb7981d0e2698b94c7d90856f188b16f5f64cf55aa7da3d5950"},"schema_version":"1.0","source":{"id":"1201.6374","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.6374","created_at":"2026-05-18T04:03:31Z"},{"alias_kind":"arxiv_version","alias_value":"1201.6374v1","created_at":"2026-05-18T04:03:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.6374","created_at":"2026-05-18T04:03:31Z"},{"alias_kind":"pith_short_12","alias_value":"GCKKWHHLE27M","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"GCKKWHHLE27M63YK","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"GCKKWHHL","created_at":"2026-05-18T12:27:06Z"}],"graph_snapshots":[{"event_id":"sha256:b1d9cdcbf4b6abed5eab8e35bb7fd5eff6688277833c4ec2a5ba867442af594b","target":"graph","created_at":"2026-05-18T04:03:31Z","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":"We report on an extensive investigation to figure out the origin of room-temperature ferromagnetism that is commonly observed by SQUID magnetometry in highly-oriented pyrolytic graphite (HOPG). Electron backscattering and X-ray microanalysis revealed the presence of micron-size magnetic clusters (predominantly Fe) that are rare and would be difficult to detect without careful search in a scanning electron microscope in the backscattering mode. The clusters pin to crystal boundaries and their quantities match the amplitude of typical ferromagnetic signals. No ferromagnetic response is detected ","authors_text":"A. K. Geim, I-Ling Tsai, I. V. Grigorieva, M. Sepioni, R. R. Nair","cross_cats":["cond-mat.other"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-01-30T21:13:08Z","title":"Revealing common artifacts due to ferromagnetic inclusions in highly-oriented pyrolytic graphite"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.6374","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":"sha256:54b966cd389e1561301b48b7636796b792555a4f501c6ad2dc9136b0194e45aa","target":"record","created_at":"2026-05-18T04:03:31Z","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":"83451798ce879e7ac3dc558ea2c540dfe32aef7a970daeeb642ff9501d76d9f8","cross_cats_sorted":["cond-mat.other"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-01-30T21:13:08Z","title_canon_sha256":"0760511fe951feb7981d0e2698b94c7d90856f188b16f5f64cf55aa7da3d5950"},"schema_version":"1.0","source":{"id":"1201.6374","kind":"arxiv","version":1}},"canonical_sha256":"3094ab1ceb26becf6f0afa83ea67f529c4b82f6d14dc528a41aa25d9ad973504","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3094ab1ceb26becf6f0afa83ea67f529c4b82f6d14dc528a41aa25d9ad973504","first_computed_at":"2026-05-18T04:03:31.711841Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:03:31.711841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mivuSjEPD0XQ5TQmc/hv5AS8NvgXupyj6bM8J0NMseYPbsIxRxzKExK6NcCZrC6mOSuNQp4EJlUOdUTrpJYiBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:03:31.712638Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.6374","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54b966cd389e1561301b48b7636796b792555a4f501c6ad2dc9136b0194e45aa","sha256:b1d9cdcbf4b6abed5eab8e35bb7fd5eff6688277833c4ec2a5ba867442af594b"],"state_sha256":"8f3a015f68983a654d11a16c147f4398068daddec3d2917a98edbf922019d8ae"}