{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:WXIWGQYVBUTUBZCVWOXQRCHA5C","short_pith_number":"pith:WXIWGQYV","canonical_record":{"source":{"id":"1509.07291","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-24T09:49:18Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"5d0127a91b562edb3fc7f7e543a95ffbfa3461c0d65eeac313863c01982adfb2","abstract_canon_sha256":"5077a20024b186482b6ef38dc192fed71343d003d11bcd900ee4f7970d9972c9"},"schema_version":"1.0"},"canonical_sha256":"b5d16343150d2740e455b3af0888e0e882684c2a54e245762a8388e7c43cad18","source":{"kind":"arxiv","id":"1509.07291","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.07291","created_at":"2026-05-18T01:32:09Z"},{"alias_kind":"arxiv_version","alias_value":"1509.07291v1","created_at":"2026-05-18T01:32:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.07291","created_at":"2026-05-18T01:32:09Z"},{"alias_kind":"pith_short_12","alias_value":"WXIWGQYVBUTU","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WXIWGQYVBUTUBZCV","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WXIWGQYV","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:WXIWGQYVBUTUBZCVWOXQRCHA5C","target":"record","payload":{"canonical_record":{"source":{"id":"1509.07291","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-24T09:49:18Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"5d0127a91b562edb3fc7f7e543a95ffbfa3461c0d65eeac313863c01982adfb2","abstract_canon_sha256":"5077a20024b186482b6ef38dc192fed71343d003d11bcd900ee4f7970d9972c9"},"schema_version":"1.0"},"canonical_sha256":"b5d16343150d2740e455b3af0888e0e882684c2a54e245762a8388e7c43cad18","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:32:09.378024Z","signature_b64":"NCeal3X0A1XdEnY987SWn+vovKwlFygV0sZMXSHpk0e14yUnzbhs/LEf2b3NGHvzsPq7995UC8wNgyJ1qf7rBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b5d16343150d2740e455b3af0888e0e882684c2a54e245762a8388e7c43cad18","last_reissued_at":"2026-05-18T01:32:09.377376Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:32:09.377376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.07291","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":"2026-05-18T01:32:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U+VJ+1LnspA6T3uffVTQK9cU0CaIas4KsWvJ20PRWQTmhplqosUnC3agxeJ1jdZIAJ0yyLBsTHi2m2ZGGiNVCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T05:03:56.586042Z"},"content_sha256":"1727248537acab2616d35071dd4589f2bd29b16faf05e24209deca04c501a830","schema_version":"1.0","event_id":"sha256:1727248537acab2616d35071dd4589f2bd29b16faf05e24209deca04c501a830"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:WXIWGQYVBUTUBZCVWOXQRCHA5C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhanced spin tunneling in a molecular magnet mixed with a superconductor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.mes-hall","authors_text":"A. Garc\\'ia-Santiago, D. Maspoch, E. M. Chudnovsky, I. Imaz, J. Espin, J. Tejada, R. Zarzuela","submitted_at":"2015-09-24T09:49:18Z","abstract_excerpt":"We report characterization and magnetic studies of mixtures of micrometer-size ribbons of Mn$_{12}$ acetate and micrometer-size particles of YBaCuO superconductor. Extremely narrow zero-field spin-tunneling resonance has been observed in the mixtures, pointing to the absence of the inhomogeneous dipolar broadening. It is attributed to the screening of the internal magnetic fields in the magnetic particles by Josephson currents between superconducting grains surrounding the particles."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.07291","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":"2026-05-18T01:32:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NpP5mlvvy4AxIbXaIvGa9AKFv5l8c/xGymRPJIr57NmGYHYM6b1kwgiblBIVMtnT65NPvkjpE2F+LZDvI0ItBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T05:03:56.586681Z"},"content_sha256":"64bf89117f08064e1b6c2c6eeb9a9bc03ea86fe2225110b283c8c069bc298fef","schema_version":"1.0","event_id":"sha256:64bf89117f08064e1b6c2c6eeb9a9bc03ea86fe2225110b283c8c069bc298fef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WXIWGQYVBUTUBZCVWOXQRCHA5C/bundle.json","state_url":"https://pith.science/pith/WXIWGQYVBUTUBZCVWOXQRCHA5C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WXIWGQYVBUTUBZCVWOXQRCHA5C/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":"2026-05-24T05:03:56Z","links":{"resolver":"https://pith.science/pith/WXIWGQYVBUTUBZCVWOXQRCHA5C","bundle":"https://pith.science/pith/WXIWGQYVBUTUBZCVWOXQRCHA5C/bundle.json","state":"https://pith.science/pith/WXIWGQYVBUTUBZCVWOXQRCHA5C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WXIWGQYVBUTUBZCVWOXQRCHA5C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WXIWGQYVBUTUBZCVWOXQRCHA5C","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":"5077a20024b186482b6ef38dc192fed71343d003d11bcd900ee4f7970d9972c9","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-24T09:49:18Z","title_canon_sha256":"5d0127a91b562edb3fc7f7e543a95ffbfa3461c0d65eeac313863c01982adfb2"},"schema_version":"1.0","source":{"id":"1509.07291","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.07291","created_at":"2026-05-18T01:32:09Z"},{"alias_kind":"arxiv_version","alias_value":"1509.07291v1","created_at":"2026-05-18T01:32:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.07291","created_at":"2026-05-18T01:32:09Z"},{"alias_kind":"pith_short_12","alias_value":"WXIWGQYVBUTU","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WXIWGQYVBUTUBZCV","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WXIWGQYV","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:64bf89117f08064e1b6c2c6eeb9a9bc03ea86fe2225110b283c8c069bc298fef","target":"graph","created_at":"2026-05-18T01:32:09Z","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 characterization and magnetic studies of mixtures of micrometer-size ribbons of Mn$_{12}$ acetate and micrometer-size particles of YBaCuO superconductor. Extremely narrow zero-field spin-tunneling resonance has been observed in the mixtures, pointing to the absence of the inhomogeneous dipolar broadening. It is attributed to the screening of the internal magnetic fields in the magnetic particles by Josephson currents between superconducting grains surrounding the particles.","authors_text":"A. Garc\\'ia-Santiago, D. Maspoch, E. M. Chudnovsky, I. Imaz, J. Espin, J. Tejada, R. Zarzuela","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-24T09:49:18Z","title":"Enhanced spin tunneling in a molecular magnet mixed with a superconductor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.07291","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":"sha256:1727248537acab2616d35071dd4589f2bd29b16faf05e24209deca04c501a830","target":"record","created_at":"2026-05-18T01:32:09Z","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":"5077a20024b186482b6ef38dc192fed71343d003d11bcd900ee4f7970d9972c9","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-09-24T09:49:18Z","title_canon_sha256":"5d0127a91b562edb3fc7f7e543a95ffbfa3461c0d65eeac313863c01982adfb2"},"schema_version":"1.0","source":{"id":"1509.07291","kind":"arxiv","version":1}},"canonical_sha256":"b5d16343150d2740e455b3af0888e0e882684c2a54e245762a8388e7c43cad18","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b5d16343150d2740e455b3af0888e0e882684c2a54e245762a8388e7c43cad18","first_computed_at":"2026-05-18T01:32:09.377376Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:32:09.377376Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NCeal3X0A1XdEnY987SWn+vovKwlFygV0sZMXSHpk0e14yUnzbhs/LEf2b3NGHvzsPq7995UC8wNgyJ1qf7rBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:32:09.378024Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.07291","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1727248537acab2616d35071dd4589f2bd29b16faf05e24209deca04c501a830","sha256:64bf89117f08064e1b6c2c6eeb9a9bc03ea86fe2225110b283c8c069bc298fef"],"state_sha256":"454a58a8f433a4ed01f23c325964eb9cd5e63892db9c942a0fae4c23ad294000"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vH28syeGvx6dTtvCtNpGA5GDt2CasnP6hmuhEhJy4yHBZhPhcuhTuCqS47qusqYklEoQTduRhmdul7W2KRA+DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T05:03:56.590153Z","bundle_sha256":"ae84cd5f3b45daffffaf5aa31791d17e1cbea40a18ae88c8a46065b99060f14f"}}