{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:3VTEV5LCWNTLALBEXFIHOD43IF","short_pith_number":"pith:3VTEV5LC","canonical_record":{"source":{"id":"cond-mat/0206518","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2002-06-26T15:14:21Z","cross_cats_sorted":[],"title_canon_sha256":"7a57261b3de3695ca9a652c1a25f463b8a3b858943af998038aab1cd71cc84a5","abstract_canon_sha256":"ee1e491ec45daccc965f45bb5c3b75c8081732306db6b0cc34786e494ced8750"},"schema_version":"1.0"},"canonical_sha256":"dd664af562b366b02c24b950770f9b41682e8af6257993f5f6809af3df9d4128","source":{"kind":"arxiv","id":"cond-mat/0206518","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0206518","created_at":"2026-05-18T01:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0206518v1","created_at":"2026-05-18T01:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0206518","created_at":"2026-05-18T01:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"3VTEV5LCWNTL","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"3VTEV5LCWNTLALBE","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"3VTEV5LC","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:3VTEV5LCWNTLALBEXFIHOD43IF","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0206518","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2002-06-26T15:14:21Z","cross_cats_sorted":[],"title_canon_sha256":"7a57261b3de3695ca9a652c1a25f463b8a3b858943af998038aab1cd71cc84a5","abstract_canon_sha256":"ee1e491ec45daccc965f45bb5c3b75c8081732306db6b0cc34786e494ced8750"},"schema_version":"1.0"},"canonical_sha256":"dd664af562b366b02c24b950770f9b41682e8af6257993f5f6809af3df9d4128","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:03.361432Z","signature_b64":"ipdPut3azRtSY4/+vU5nia2AVeFGxxUCe3ERT3Zf6fuR9jHHL71c+B9Mk6c2cdDDVyLOxUZFW1lcLI/fh/LACw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dd664af562b366b02c24b950770f9b41682e8af6257993f5f6809af3df9d4128","last_reissued_at":"2026-05-18T01:40:03.360758Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:03.360758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0206518","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":"2026-05-18T01:40:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h8+ludl21RG8FXoySROD7vW3a9ZUlP9hsZ1QFxCEefjoD+wApHFkpvwlo/RDeATjA4YuEsL6ibS4i61lWAk0Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:02:13.585235Z"},"content_sha256":"18d4dacacc9770fe78a15c289f90613851ac362699106fc0db553eb48978881a","schema_version":"1.0","event_id":"sha256:18d4dacacc9770fe78a15c289f90613851ac362699106fc0db553eb48978881a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:3VTEV5LCWNTLALBEXFIHOD43IF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effects of unreacted Mg impurities on the transport properties of MgB2","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. H. Lacerda, C. U. Jung, G. S. Boebinger, Heon-Jung Kim, J. B. Betts, J. Y. Kim, K. H. Kim, Min-Seok Park, M. Jaime, Mun-Seog Kim, Sung-Ik Lee, Zhonglian Du","submitted_at":"2002-06-26T15:14:21Z","abstract_excerpt":"We synthesized polycrystalline MgB2 from a stoichiometric mixture of Mg and the 11 B isotope under different conditions. All the samples showed bulk superconductivity with Tc = 38~39 K. The samples containing the least amount of unreacted Mg showed the highest Tc and the sharpest transition width (Delta_Tc). A residual resistivity ratio (RRR) of ~ 5.8, and a magnetoresistance (MR), at 40 K, of 12% were obtained for these samples. Moreover, there was no upturn of resistivity in a low temperature region at 10 Tesla. The samples containing appreciable amounts of unreacted Mg showed quite differen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0206518","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":"2026-05-18T01:40:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K1K+YDhFMV2WzAvtRArEKJmZe1oJRAsCJgRDwFNVQsuzRa/rzXrxnpsw5TFOSE+cDYQzFGpORP82qQpQ20ONCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T05:02:13.586014Z"},"content_sha256":"068843bd2bd1cd048582887fdb9d92de6fe86636d0e69910f70a08e42f8049b8","schema_version":"1.0","event_id":"sha256:068843bd2bd1cd048582887fdb9d92de6fe86636d0e69910f70a08e42f8049b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3VTEV5LCWNTLALBEXFIHOD43IF/bundle.json","state_url":"https://pith.science/pith/3VTEV5LCWNTLALBEXFIHOD43IF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3VTEV5LCWNTLALBEXFIHOD43IF/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":"2026-05-20T05:02:13Z","links":{"resolver":"https://pith.science/pith/3VTEV5LCWNTLALBEXFIHOD43IF","bundle":"https://pith.science/pith/3VTEV5LCWNTLALBEXFIHOD43IF/bundle.json","state":"https://pith.science/pith/3VTEV5LCWNTLALBEXFIHOD43IF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3VTEV5LCWNTLALBEXFIHOD43IF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:3VTEV5LCWNTLALBEXFIHOD43IF","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":"ee1e491ec45daccc965f45bb5c3b75c8081732306db6b0cc34786e494ced8750","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2002-06-26T15:14:21Z","title_canon_sha256":"7a57261b3de3695ca9a652c1a25f463b8a3b858943af998038aab1cd71cc84a5"},"schema_version":"1.0","source":{"id":"cond-mat/0206518","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0206518","created_at":"2026-05-18T01:40:03Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0206518v1","created_at":"2026-05-18T01:40:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0206518","created_at":"2026-05-18T01:40:03Z"},{"alias_kind":"pith_short_12","alias_value":"3VTEV5LCWNTL","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"3VTEV5LCWNTLALBE","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"3VTEV5LC","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:068843bd2bd1cd048582887fdb9d92de6fe86636d0e69910f70a08e42f8049b8","target":"graph","created_at":"2026-05-18T01:40:03Z","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":"We synthesized polycrystalline MgB2 from a stoichiometric mixture of Mg and the 11 B isotope under different conditions. All the samples showed bulk superconductivity with Tc = 38~39 K. The samples containing the least amount of unreacted Mg showed the highest Tc and the sharpest transition width (Delta_Tc). A residual resistivity ratio (RRR) of ~ 5.8, and a magnetoresistance (MR), at 40 K, of 12% were obtained for these samples. Moreover, there was no upturn of resistivity in a low temperature region at 10 Tesla. The samples containing appreciable amounts of unreacted Mg showed quite differen","authors_text":"A. H. Lacerda, C. U. Jung, G. S. Boebinger, Heon-Jung Kim, J. B. Betts, J. Y. Kim, K. H. Kim, Min-Seok Park, M. Jaime, Mun-Seog Kim, Sung-Ik Lee, Zhonglian Du","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2002-06-26T15:14:21Z","title":"Effects of unreacted Mg impurities on the transport properties of MgB2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0206518","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":"sha256:18d4dacacc9770fe78a15c289f90613851ac362699106fc0db553eb48978881a","target":"record","created_at":"2026-05-18T01:40:03Z","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":"ee1e491ec45daccc965f45bb5c3b75c8081732306db6b0cc34786e494ced8750","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2002-06-26T15:14:21Z","title_canon_sha256":"7a57261b3de3695ca9a652c1a25f463b8a3b858943af998038aab1cd71cc84a5"},"schema_version":"1.0","source":{"id":"cond-mat/0206518","kind":"arxiv","version":1}},"canonical_sha256":"dd664af562b366b02c24b950770f9b41682e8af6257993f5f6809af3df9d4128","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dd664af562b366b02c24b950770f9b41682e8af6257993f5f6809af3df9d4128","first_computed_at":"2026-05-18T01:40:03.360758Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:03.360758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ipdPut3azRtSY4/+vU5nia2AVeFGxxUCe3ERT3Zf6fuR9jHHL71c+B9Mk6c2cdDDVyLOxUZFW1lcLI/fh/LACw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:03.361432Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0206518","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:18d4dacacc9770fe78a15c289f90613851ac362699106fc0db553eb48978881a","sha256:068843bd2bd1cd048582887fdb9d92de6fe86636d0e69910f70a08e42f8049b8"],"state_sha256":"e46071ef267988e416a442809f1058d196fbacf201fe3764a29212cbc6ee7541"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hInY3bF+of3Y1NvbzNXn27IOtpMf/wsMThON9gZKyzgm6tqPa7/eM3cW7O4tXCB5wySJ/L342CBRg6PeuqZCBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T05:02:13.590541Z","bundle_sha256":"cd14bf1ed732cbd817f09c4d3af8f25d2426c6357c02edad4890c59d314a0d21"}}