{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:ZX63ICWUB7QJTGVUFCGOEBJT62","short_pith_number":"pith:ZX63ICWU","canonical_record":{"source":{"id":"cond-mat/0404468","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2004-04-20T12:53:03Z","cross_cats_sorted":[],"title_canon_sha256":"a7c168cef4332e011ac8305789276b276ead6ffa293de96afa69ca77ac5eabc0","abstract_canon_sha256":"93bb21f1e4c99ef41e1ae55f809852bdb3933bfd17bad370ba0e2b8237feba6d"},"schema_version":"1.0"},"canonical_sha256":"cdfdb40ad40fe0999ab4288ce20533f69515c71c705ad985f57e6e6d3461ccd8","source":{"kind":"arxiv","id":"cond-mat/0404468","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0404468","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0404468v1","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0404468","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"pith_short_12","alias_value":"ZX63ICWUB7QJ","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"pith_short_16","alias_value":"ZX63ICWUB7QJTGVU","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"pith_short_8","alias_value":"ZX63ICWU","created_at":"2026-07-04T16:46:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:ZX63ICWUB7QJTGVUFCGOEBJT62","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0404468","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2004-04-20T12:53:03Z","cross_cats_sorted":[],"title_canon_sha256":"a7c168cef4332e011ac8305789276b276ead6ffa293de96afa69ca77ac5eabc0","abstract_canon_sha256":"93bb21f1e4c99ef41e1ae55f809852bdb3933bfd17bad370ba0e2b8237feba6d"},"schema_version":"1.0"},"canonical_sha256":"cdfdb40ad40fe0999ab4288ce20533f69515c71c705ad985f57e6e6d3461ccd8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:46:13.331409Z","signature_b64":"M9ef5XD4bx0c6t1grDIQ9pIpHre+R7K9w9NyAPEvpaRJMamUXoNq4CJKB77S/YwTSg8lnWRd94IJbPmI3v8NAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cdfdb40ad40fe0999ab4288ce20533f69515c71c705ad985f57e6e6d3461ccd8","last_reissued_at":"2026-07-04T16:46:13.330992Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:46:13.330992Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0404468","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":"2026-07-04T16:46:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IT6U29HriNV+f+Mr9z7s/EaK1slsSG2MxyiEHShy/E+5iU/Cff7jzLy+RTa+WUcxviaijEFh46huZQJCFXhzCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T02:13:45.667212Z"},"content_sha256":"1a9d6a07acea2d54fb0dcbc22ba799a2151d178c811daa6a912e058000449197","schema_version":"1.0","event_id":"sha256:1a9d6a07acea2d54fb0dcbc22ba799a2151d178c811daa6a912e058000449197"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:ZX63ICWUB7QJTGVUFCGOEBJT62","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cooperative ordering of gapped and gapless spin networks in Cu$_2$Fe$_2$Ge$_4$O$_{13}$","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A. Zheludev, B. Grenier, E. Ressouche, K. Uchinokura, S. Imai, S. Park, T. Masuda","submitted_at":"2004-04-20T12:53:03Z","abstract_excerpt":"The unusual magnetic properties of a novel low-dimensional quantum ferrimagnet Cu$_2$Fe$_2$Ge$_4$O$_{13}$ are studied using bulk methods, neutron diffraction and inelastic neutron scattering. It is shown that this material can be described in terms of two low-dimensional quantum spin subsystems, one gapped and the other gapless, characterized by two distinct energy scales. Long-range magnetic ordering observed at low temperatures is a cooperative phenomenon caused by weak coupling of these two spin networks."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0404468","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/cond-mat/0404468/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:46:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"izfRo89qLYhQEXaUSRVtAU32BVPUCYpg5D1+n//eMHN5AR9TRVYiPGuDneSuSLrDvQKNWJUaQzMynMnjjXMVBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T02:13:45.667643Z"},"content_sha256":"15cdc1aa67859f597f8641f7c37c3a48c648f67830a7adb0cca38f5bc640155c","schema_version":"1.0","event_id":"sha256:15cdc1aa67859f597f8641f7c37c3a48c648f67830a7adb0cca38f5bc640155c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZX63ICWUB7QJTGVUFCGOEBJT62/bundle.json","state_url":"https://pith.science/pith/ZX63ICWUB7QJTGVUFCGOEBJT62/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZX63ICWUB7QJTGVUFCGOEBJT62/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":"2026-07-05T02:13:45Z","links":{"resolver":"https://pith.science/pith/ZX63ICWUB7QJTGVUFCGOEBJT62","bundle":"https://pith.science/pith/ZX63ICWUB7QJTGVUFCGOEBJT62/bundle.json","state":"https://pith.science/pith/ZX63ICWUB7QJTGVUFCGOEBJT62/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZX63ICWUB7QJTGVUFCGOEBJT62/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:ZX63ICWUB7QJTGVUFCGOEBJT62","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":"93bb21f1e4c99ef41e1ae55f809852bdb3933bfd17bad370ba0e2b8237feba6d","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2004-04-20T12:53:03Z","title_canon_sha256":"a7c168cef4332e011ac8305789276b276ead6ffa293de96afa69ca77ac5eabc0"},"schema_version":"1.0","source":{"id":"cond-mat/0404468","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0404468","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0404468v1","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0404468","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"pith_short_12","alias_value":"ZX63ICWUB7QJ","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"pith_short_16","alias_value":"ZX63ICWUB7QJTGVU","created_at":"2026-07-04T16:46:13Z"},{"alias_kind":"pith_short_8","alias_value":"ZX63ICWU","created_at":"2026-07-04T16:46:13Z"}],"graph_snapshots":[{"event_id":"sha256:15cdc1aa67859f597f8641f7c37c3a48c648f67830a7adb0cca38f5bc640155c","target":"graph","created_at":"2026-07-04T16:46:13Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/cond-mat/0404468/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The unusual magnetic properties of a novel low-dimensional quantum ferrimagnet Cu$_2$Fe$_2$Ge$_4$O$_{13}$ are studied using bulk methods, neutron diffraction and inelastic neutron scattering. It is shown that this material can be described in terms of two low-dimensional quantum spin subsystems, one gapped and the other gapless, characterized by two distinct energy scales. Long-range magnetic ordering observed at low temperatures is a cooperative phenomenon caused by weak coupling of these two spin networks.","authors_text":"A. Zheludev, B. Grenier, E. Ressouche, K. Uchinokura, S. Imai, S. Park, T. Masuda","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.str-el","submitted_at":"2004-04-20T12:53:03Z","title":"Cooperative ordering of gapped and gapless spin networks in Cu$_2$Fe$_2$Ge$_4$O$_{13}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0404468","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":"sha256:1a9d6a07acea2d54fb0dcbc22ba799a2151d178c811daa6a912e058000449197","target":"record","created_at":"2026-07-04T16:46:13Z","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":"93bb21f1e4c99ef41e1ae55f809852bdb3933bfd17bad370ba0e2b8237feba6d","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2004-04-20T12:53:03Z","title_canon_sha256":"a7c168cef4332e011ac8305789276b276ead6ffa293de96afa69ca77ac5eabc0"},"schema_version":"1.0","source":{"id":"cond-mat/0404468","kind":"arxiv","version":1}},"canonical_sha256":"cdfdb40ad40fe0999ab4288ce20533f69515c71c705ad985f57e6e6d3461ccd8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdfdb40ad40fe0999ab4288ce20533f69515c71c705ad985f57e6e6d3461ccd8","first_computed_at":"2026-07-04T16:46:13.330992Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:46:13.330992Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"M9ef5XD4bx0c6t1grDIQ9pIpHre+R7K9w9NyAPEvpaRJMamUXoNq4CJKB77S/YwTSg8lnWRd94IJbPmI3v8NAw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:46:13.331409Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0404468","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a9d6a07acea2d54fb0dcbc22ba799a2151d178c811daa6a912e058000449197","sha256:15cdc1aa67859f597f8641f7c37c3a48c648f67830a7adb0cca38f5bc640155c"],"state_sha256":"61a5003b9468d636eda8fc6844ecb5ed0810dcba715aa0bbb89222d0ee1f74a6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/jkrfI1ukPVS+9T9DdmbZ+m3hhbjSpVjdGXQkmK5JcE2wk9BDQKYp0eeZrsf1w1DosP0Z9sDFe1PehxWoSPzAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T02:13:45.669660Z","bundle_sha256":"b478fcda8f4ebf25fdce77af4f7d1e14549f8dc01f89c6008ab22e4fd4b82366"}}