{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:MT76AEAR2XGZZSUPK34DTNMCCS","short_pith_number":"pith:MT76AEAR","canonical_record":{"source":{"id":"0911.4402","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-11-23T13:50:07Z","cross_cats_sorted":[],"title_canon_sha256":"f40e4756c8d22c4be04be4a223fbe9ba79b6e07a5570864d37b6caeb614052f8","abstract_canon_sha256":"f1e1ebf60524d8ebc6040ed0dd71232b42207b8406fbcde2253f335ccfdebd99"},"schema_version":"1.0"},"canonical_sha256":"64ffe01011d5cd9cca8f56f839b58214b086dc48f0cbf2da06067a7ceb6b930d","source":{"kind":"arxiv","id":"0911.4402","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.4402","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"arxiv_version","alias_value":"0911.4402v1","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.4402","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"pith_short_12","alias_value":"MT76AEAR2XGZ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MT76AEAR2XGZZSUP","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MT76AEAR","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:MT76AEAR2XGZZSUPK34DTNMCCS","target":"record","payload":{"canonical_record":{"source":{"id":"0911.4402","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-11-23T13:50:07Z","cross_cats_sorted":[],"title_canon_sha256":"f40e4756c8d22c4be04be4a223fbe9ba79b6e07a5570864d37b6caeb614052f8","abstract_canon_sha256":"f1e1ebf60524d8ebc6040ed0dd71232b42207b8406fbcde2253f335ccfdebd99"},"schema_version":"1.0"},"canonical_sha256":"64ffe01011d5cd9cca8f56f839b58214b086dc48f0cbf2da06067a7ceb6b930d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:27:15.130128Z","signature_b64":"Ns/CcabcSS+A4s6tyeR77Hf3e1/PWY2zxjZdqBwhurHbttWhZckfyuSS6yv+MBapECUk3lezefNGzYb2+U5xCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"64ffe01011d5cd9cca8f56f839b58214b086dc48f0cbf2da06067a7ceb6b930d","last_reissued_at":"2026-05-18T04:27:15.129526Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:27:15.129526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.4402","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":"2026-05-18T04:27:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fCkCigjGfLgfVF3G3TORM3dFxzIm+7kxykKKYNHDq6RW5+Tb+lJlxYuKiY0TuOMaMBfsshJoai86yxzztlZSBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:48:28.200293Z"},"content_sha256":"1493275cd1e70dec6ba229d096cc3e4dd5acd15cf504adde5f25a01d42033038","schema_version":"1.0","event_id":"sha256:1493275cd1e70dec6ba229d096cc3e4dd5acd15cf504adde5f25a01d42033038"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:MT76AEAR2XGZZSUPK34DTNMCCS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic properties of the quasi-two-dimensional S = 1/2 Heisenberg antiferromagnet [Cu(pyz)2(HF2)]PF6","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"E. Cizmar, J. A. Schlueter, J. L. Manson, J. Wosnitza, M. Ozerov, M. Uhlarz, R. Beyer, S. A. Zvyagin, Y. Skourski","submitted_at":"2009-11-23T13:50:07Z","abstract_excerpt":"We report on high-field magnetization, specific-heat and electron spin resonance (ESR) studies of the quasi-two-dimensional spin-1/2 Heisenberg antiferromagnet [Cu(pyz)2(HF2)]PF6. The frequency-field diagram of ESR modes below TN = 4.38 K is described in the frame of the meanfield theory, confirming a collinear magnetic structure with an easy-plane anisotropy. The obtained results allowed us to determine the anisotropy/exchange interaction ratio, A/J = 0.003, and the upper limit for the inter/intra-plane exchange-interaction ratio, J'/J = 1/16. It is argued that despite the onset of 3D long-ra"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.4402","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":"2026-05-18T04:27:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X23wMe1OVkIDJHGfp/auWOXC1f1vnHZ8VdKZipsRQqZBWQr5c4ozN0F4EMlnbGtp4iI8yTWKbArbhEkOdbbRCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:48:28.200658Z"},"content_sha256":"8ffc9113d5f071575d5e87e5d5145313093454190d8541fb9de7605f15aa946c","schema_version":"1.0","event_id":"sha256:8ffc9113d5f071575d5e87e5d5145313093454190d8541fb9de7605f15aa946c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MT76AEAR2XGZZSUPK34DTNMCCS/bundle.json","state_url":"https://pith.science/pith/MT76AEAR2XGZZSUPK34DTNMCCS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MT76AEAR2XGZZSUPK34DTNMCCS/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":"2026-05-30T22:48:28Z","links":{"resolver":"https://pith.science/pith/MT76AEAR2XGZZSUPK34DTNMCCS","bundle":"https://pith.science/pith/MT76AEAR2XGZZSUPK34DTNMCCS/bundle.json","state":"https://pith.science/pith/MT76AEAR2XGZZSUPK34DTNMCCS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MT76AEAR2XGZZSUPK34DTNMCCS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:MT76AEAR2XGZZSUPK34DTNMCCS","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":"f1e1ebf60524d8ebc6040ed0dd71232b42207b8406fbcde2253f335ccfdebd99","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-11-23T13:50:07Z","title_canon_sha256":"f40e4756c8d22c4be04be4a223fbe9ba79b6e07a5570864d37b6caeb614052f8"},"schema_version":"1.0","source":{"id":"0911.4402","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.4402","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"arxiv_version","alias_value":"0911.4402v1","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.4402","created_at":"2026-05-18T04:27:15Z"},{"alias_kind":"pith_short_12","alias_value":"MT76AEAR2XGZ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MT76AEAR2XGZZSUP","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MT76AEAR","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:8ffc9113d5f071575d5e87e5d5145313093454190d8541fb9de7605f15aa946c","target":"graph","created_at":"2026-05-18T04:27:15Z","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 high-field magnetization, specific-heat and electron spin resonance (ESR) studies of the quasi-two-dimensional spin-1/2 Heisenberg antiferromagnet [Cu(pyz)2(HF2)]PF6. The frequency-field diagram of ESR modes below TN = 4.38 K is described in the frame of the meanfield theory, confirming a collinear magnetic structure with an easy-plane anisotropy. The obtained results allowed us to determine the anisotropy/exchange interaction ratio, A/J = 0.003, and the upper limit for the inter/intra-plane exchange-interaction ratio, J'/J = 1/16. It is argued that despite the onset of 3D long-ra","authors_text":"E. Cizmar, J. A. Schlueter, J. L. Manson, J. Wosnitza, M. Ozerov, M. Uhlarz, R. Beyer, S. A. Zvyagin, Y. Skourski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-11-23T13:50:07Z","title":"Magnetic properties of the quasi-two-dimensional S = 1/2 Heisenberg antiferromagnet [Cu(pyz)2(HF2)]PF6"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.4402","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":"sha256:1493275cd1e70dec6ba229d096cc3e4dd5acd15cf504adde5f25a01d42033038","target":"record","created_at":"2026-05-18T04:27:15Z","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":"f1e1ebf60524d8ebc6040ed0dd71232b42207b8406fbcde2253f335ccfdebd99","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-11-23T13:50:07Z","title_canon_sha256":"f40e4756c8d22c4be04be4a223fbe9ba79b6e07a5570864d37b6caeb614052f8"},"schema_version":"1.0","source":{"id":"0911.4402","kind":"arxiv","version":1}},"canonical_sha256":"64ffe01011d5cd9cca8f56f839b58214b086dc48f0cbf2da06067a7ceb6b930d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"64ffe01011d5cd9cca8f56f839b58214b086dc48f0cbf2da06067a7ceb6b930d","first_computed_at":"2026-05-18T04:27:15.129526Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:27:15.129526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ns/CcabcSS+A4s6tyeR77Hf3e1/PWY2zxjZdqBwhurHbttWhZckfyuSS6yv+MBapECUk3lezefNGzYb2+U5xCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:27:15.130128Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.4402","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1493275cd1e70dec6ba229d096cc3e4dd5acd15cf504adde5f25a01d42033038","sha256:8ffc9113d5f071575d5e87e5d5145313093454190d8541fb9de7605f15aa946c"],"state_sha256":"33880a4f6e803a269fafcb5ea0c1a093700a39d0d03acf79f7b23072063fe141"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jtU7UqN8iPGeCRHKlmvr4ignDw2mRaWIYhK0/5KapngIEEJt6fI/dbab2EO5jom0RNp0MIQg0cLmdQxQZhSnDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:48:28.202709Z","bundle_sha256":"25634d8c6691ee8ec774f823e92592ea3ead130101709aa2fe118450a3d76810"}}