{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:MCPE7SSZBAHVLGALHY6WOIWUJH","short_pith_number":"pith:MCPE7SSZ","canonical_record":{"source":{"id":"cond-mat/0302620","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-02-28T17:31:27Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"09955f3894eaa29f80c436d6851cdb08801d4955e137a8f2cfbf5d43b892ad28","abstract_canon_sha256":"d39494f5dd151f596565340580b7968fb0143eb5e7c2c35cad44941c04883889"},"schema_version":"1.0"},"canonical_sha256":"609e4fca59080f55980b3e3d6722d449c3f8af998c633dc44c2975d872f1ff75","source":{"kind":"arxiv","id":"cond-mat/0302620","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0302620","created_at":"2026-05-18T03:42:34Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0302620v1","created_at":"2026-05-18T03:42:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0302620","created_at":"2026-05-18T03:42:34Z"},{"alias_kind":"pith_short_12","alias_value":"MCPE7SSZBAHV","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"MCPE7SSZBAHVLGAL","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"MCPE7SSZ","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:MCPE7SSZBAHVLGALHY6WOIWUJH","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0302620","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-02-28T17:31:27Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"09955f3894eaa29f80c436d6851cdb08801d4955e137a8f2cfbf5d43b892ad28","abstract_canon_sha256":"d39494f5dd151f596565340580b7968fb0143eb5e7c2c35cad44941c04883889"},"schema_version":"1.0"},"canonical_sha256":"609e4fca59080f55980b3e3d6722d449c3f8af998c633dc44c2975d872f1ff75","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:42:34.419168Z","signature_b64":"/ObBemrP23bAUm2cPGjJkgw71cxaNgQFhiSTqV1daAwVGAQCuXhICuHcC1eSjYoCreJAxkHuRq9rXlVpYERmBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"609e4fca59080f55980b3e3d6722d449c3f8af998c633dc44c2975d872f1ff75","last_reissued_at":"2026-05-18T03:42:34.418570Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:42:34.418570Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0302620","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":"2026-05-18T03:42:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KKkUnXkXlruHmttcF9LGWZ2CPacKW0zh9U1Pay5I3gfC10p/kmdEOvkWQElXwbmAJ4Rm+NpdpQq9e49wW+FLCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T19:24:57.658243Z"},"content_sha256":"58a736c1b5b84d415dbb68f01e4c9a95dcfe88853075b287520815f631a4734b","schema_version":"1.0","event_id":"sha256:58a736c1b5b84d415dbb68f01e4c9a95dcfe88853075b287520815f631a4734b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:MCPE7SSZBAHVLGALHY6WOIWUJH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic Field Induced Density of States in Superconducting MgB$_{2}$: Measurement of Conduction Electron Spin-Susceptibility","license":"","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"A. Janossy, Ames, Astronomy, C. Petrovic, Department of Physics, F. Muranyi (Budapest University of Technology, F. Simon, Hungary), Iowa), Lausanne, L. Forro (Ecole Polytechnique, P. C. Canfield (Ames Laboratory, R. A. Ribeiro, S. Bud'ko, S. Garaj, Switzerland), T. Feher, U.S. DOE","submitted_at":"2003-02-28T17:31:27Z","abstract_excerpt":"The magnetic field dependence of the spin-susceptibility, $\\chi_{s}$ was measured in the superconducting state of high purity MgB$_{2}$ fine powders below 1.3 T. $\\chi_{s}$ was determined from the intensity of the conduction electron spin resonance spectra at 3.8, 9.4, and 35 GHz. At the lowest magnetic fields (0.14 T), a gap opens in the density of states at the Fermi energy and, accordingly, $\\chi_{s}(T)$ is small at low temperatures. Fields above 0.2 T (about 15 % of $H^{c}_{c2}$, the minimum upper critical field), destroy the gap. The field induced $\\chi_{s}$ is much larger than expected f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0302620","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":"2026-05-18T03:42:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7bn1qiuav/NFHxZ6E3Hk45Scdguyd2Wn+f4m3yLmd7UwiLYdELPidvYInhiD9bXRmbe5Myp3hMu5/YbilZgXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T19:24:57.658621Z"},"content_sha256":"3a67e28810ec09851f8b85423e671b1e64b6b4673e174b939f3daa112dfda6ff","schema_version":"1.0","event_id":"sha256:3a67e28810ec09851f8b85423e671b1e64b6b4673e174b939f3daa112dfda6ff"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MCPE7SSZBAHVLGALHY6WOIWUJH/bundle.json","state_url":"https://pith.science/pith/MCPE7SSZBAHVLGALHY6WOIWUJH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MCPE7SSZBAHVLGALHY6WOIWUJH/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":"2026-05-30T19:24:57Z","links":{"resolver":"https://pith.science/pith/MCPE7SSZBAHVLGALHY6WOIWUJH","bundle":"https://pith.science/pith/MCPE7SSZBAHVLGALHY6WOIWUJH/bundle.json","state":"https://pith.science/pith/MCPE7SSZBAHVLGALHY6WOIWUJH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MCPE7SSZBAHVLGALHY6WOIWUJH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:MCPE7SSZBAHVLGALHY6WOIWUJH","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":"d39494f5dd151f596565340580b7968fb0143eb5e7c2c35cad44941c04883889","cross_cats_sorted":["cond-mat.str-el"],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-02-28T17:31:27Z","title_canon_sha256":"09955f3894eaa29f80c436d6851cdb08801d4955e137a8f2cfbf5d43b892ad28"},"schema_version":"1.0","source":{"id":"cond-mat/0302620","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0302620","created_at":"2026-05-18T03:42:34Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0302620v1","created_at":"2026-05-18T03:42:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0302620","created_at":"2026-05-18T03:42:34Z"},{"alias_kind":"pith_short_12","alias_value":"MCPE7SSZBAHV","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"MCPE7SSZBAHVLGAL","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"MCPE7SSZ","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:3a67e28810ec09851f8b85423e671b1e64b6b4673e174b939f3daa112dfda6ff","target":"graph","created_at":"2026-05-18T03:42:34Z","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":"The magnetic field dependence of the spin-susceptibility, $\\chi_{s}$ was measured in the superconducting state of high purity MgB$_{2}$ fine powders below 1.3 T. $\\chi_{s}$ was determined from the intensity of the conduction electron spin resonance spectra at 3.8, 9.4, and 35 GHz. At the lowest magnetic fields (0.14 T), a gap opens in the density of states at the Fermi energy and, accordingly, $\\chi_{s}(T)$ is small at low temperatures. Fields above 0.2 T (about 15 % of $H^{c}_{c2}$, the minimum upper critical field), destroy the gap. The field induced $\\chi_{s}$ is much larger than expected f","authors_text":"A. Janossy, Ames, Astronomy, C. Petrovic, Department of Physics, F. Muranyi (Budapest University of Technology, F. Simon, Hungary), Iowa), Lausanne, L. Forro (Ecole Polytechnique, P. C. Canfield (Ames Laboratory, R. A. Ribeiro, S. Bud'ko, S. Garaj, Switzerland), T. Feher, U.S. DOE","cross_cats":["cond-mat.str-el"],"headline":"","license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-02-28T17:31:27Z","title":"Magnetic Field Induced Density of States in Superconducting MgB$_{2}$: Measurement of Conduction Electron Spin-Susceptibility"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0302620","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":"sha256:58a736c1b5b84d415dbb68f01e4c9a95dcfe88853075b287520815f631a4734b","target":"record","created_at":"2026-05-18T03:42:34Z","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":"d39494f5dd151f596565340580b7968fb0143eb5e7c2c35cad44941c04883889","cross_cats_sorted":["cond-mat.str-el"],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-02-28T17:31:27Z","title_canon_sha256":"09955f3894eaa29f80c436d6851cdb08801d4955e137a8f2cfbf5d43b892ad28"},"schema_version":"1.0","source":{"id":"cond-mat/0302620","kind":"arxiv","version":1}},"canonical_sha256":"609e4fca59080f55980b3e3d6722d449c3f8af998c633dc44c2975d872f1ff75","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"609e4fca59080f55980b3e3d6722d449c3f8af998c633dc44c2975d872f1ff75","first_computed_at":"2026-05-18T03:42:34.418570Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:42:34.418570Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/ObBemrP23bAUm2cPGjJkgw71cxaNgQFhiSTqV1daAwVGAQCuXhICuHcC1eSjYoCreJAxkHuRq9rXlVpYERmBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:42:34.419168Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0302620","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58a736c1b5b84d415dbb68f01e4c9a95dcfe88853075b287520815f631a4734b","sha256:3a67e28810ec09851f8b85423e671b1e64b6b4673e174b939f3daa112dfda6ff"],"state_sha256":"b4638975a47053429975374e9ca49532c7bff65ec2d431c2d5e4eb0c4eeb4b0e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yQsWUUtdZGbQmTgsxux3kNcHjvNIGYp4LtJ0SRF5dq29hiie40RIjqytSvU0zsuixmguE4ZsG4GgP6WrYLLaDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T19:24:57.660687Z","bundle_sha256":"ba4ebfc32f2e7607a7df337b509b577960bd25edb4baf545f195da8250928925"}}