{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:7CGNY5TLPQRS4LUC736HLL332C","short_pith_number":"pith:7CGNY5TL","canonical_record":{"source":{"id":"0808.0744","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-08-06T16:16:23Z","cross_cats_sorted":[],"title_canon_sha256":"bd30e4b191eb45526c17237c87f54ba2261b3b2da0c520f1739ff61c717db521","abstract_canon_sha256":"98566eadd6b4a7781f258bd7018955b0c449f860af17a986a9c3487b66ba6f59"},"schema_version":"1.0"},"canonical_sha256":"f88cdc766b7c232e2e82fefc75af7bd08d6d57bf477d7dd3fa38bc0b6c0adb27","source":{"kind":"arxiv","id":"0808.0744","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.0744","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"arxiv_version","alias_value":"0808.0744v3","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.0744","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"pith_short_12","alias_value":"7CGNY5TLPQRS","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"pith_short_16","alias_value":"7CGNY5TLPQRS4LUC","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"pith_short_8","alias_value":"7CGNY5TL","created_at":"2026-07-04T15:37:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:7CGNY5TLPQRS4LUC736HLL332C","target":"record","payload":{"canonical_record":{"source":{"id":"0808.0744","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-08-06T16:16:23Z","cross_cats_sorted":[],"title_canon_sha256":"bd30e4b191eb45526c17237c87f54ba2261b3b2da0c520f1739ff61c717db521","abstract_canon_sha256":"98566eadd6b4a7781f258bd7018955b0c449f860af17a986a9c3487b66ba6f59"},"schema_version":"1.0"},"canonical_sha256":"f88cdc766b7c232e2e82fefc75af7bd08d6d57bf477d7dd3fa38bc0b6c0adb27","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:37:31.160012Z","signature_b64":"vtOREysqlAGITaQAC5RdM91VsKjPU+t16xJLySaffmjVPJfSKHmptLFEETJi0cOfOztYrH/Yi9wbFDm9T6P0Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f88cdc766b7c232e2e82fefc75af7bd08d6d57bf477d7dd3fa38bc0b6c0adb27","last_reissued_at":"2026-07-04T15:37:31.159628Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:37:31.159628Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0808.0744","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:37:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y2jwHVTySb7E5niYuFEUT+tv6GQumdekhyu2rHYtVUDGQid3Y3xl6kfQC+Opn3xaSR+GEWArNiDR3ibiqe2QAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T02:10:54.384347Z"},"content_sha256":"e8a9a9c506202e05097ab3b88a425dc01be0a15126955a11955ee6389aaef1e2","schema_version":"1.0","event_id":"sha256:e8a9a9c506202e05097ab3b88a425dc01be0a15126955a11955ee6389aaef1e2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:7CGNY5TLPQRS4LUC736HLL332C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First order magnetic transition in single crystal CaFe$_2$As$_2$ detected by $^{75}$As NMR","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"E. D. Bauer, F. Ronning, J. D. Thompson, N. J. Curro, S.-H. Baek, T. Klimczuk","submitted_at":"2008-08-06T16:16:23Z","abstract_excerpt":"We report $^{75}$As Nuclear Magnetic Resonance data in a single crystal of CaFe$_2$As$_2$. The Knight shift, electric field gradient, and spin-lattice relaxation rate are strongly temperature dependent in the paramagnetic state, and change discontinuously at the structural transition temperature, $T_S=T_N=167$ K. Immediately below, the NMR spectra reveal an internal field at the As site associated with the presence of a commensurate magnetic order. These results indicate that the structural and magnetic transitions in CaFe$_2$As$_2$ are first order and strongly coupled, and that the electron d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.0744","kind":"arxiv","version":3},"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/0808.0744/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":"2026-07-04T15:37:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"agTyr9JoEnVYOCEzszVHx6uBKwmmxZmswB05XvaLQ5FdbKud+jS0+S/FTOgQBemiN6EIPavysbrzOPNEmEirDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T02:10:54.384883Z"},"content_sha256":"83cb6fa17894d6ab5a909f93e0669cc1edc2fe85c4d8ccd622e2d021d92ebe7c","schema_version":"1.0","event_id":"sha256:83cb6fa17894d6ab5a909f93e0669cc1edc2fe85c4d8ccd622e2d021d92ebe7c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7CGNY5TLPQRS4LUC736HLL332C/bundle.json","state_url":"https://pith.science/pith/7CGNY5TLPQRS4LUC736HLL332C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7CGNY5TLPQRS4LUC736HLL332C/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":"2026-08-11T02:10:54Z","links":{"resolver":"https://pith.science/pith/7CGNY5TLPQRS4LUC736HLL332C","bundle":"https://pith.science/pith/7CGNY5TLPQRS4LUC736HLL332C/bundle.json","state":"https://pith.science/pith/7CGNY5TLPQRS4LUC736HLL332C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7CGNY5TLPQRS4LUC736HLL332C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:7CGNY5TLPQRS4LUC736HLL332C","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":"98566eadd6b4a7781f258bd7018955b0c449f860af17a986a9c3487b66ba6f59","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-08-06T16:16:23Z","title_canon_sha256":"bd30e4b191eb45526c17237c87f54ba2261b3b2da0c520f1739ff61c717db521"},"schema_version":"1.0","source":{"id":"0808.0744","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.0744","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"arxiv_version","alias_value":"0808.0744v3","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.0744","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"pith_short_12","alias_value":"7CGNY5TLPQRS","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"pith_short_16","alias_value":"7CGNY5TLPQRS4LUC","created_at":"2026-07-04T15:37:31Z"},{"alias_kind":"pith_short_8","alias_value":"7CGNY5TL","created_at":"2026-07-04T15:37:31Z"}],"graph_snapshots":[{"event_id":"sha256:83cb6fa17894d6ab5a909f93e0669cc1edc2fe85c4d8ccd622e2d021d92ebe7c","target":"graph","created_at":"2026-07-04T15:37:31Z","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/0808.0744/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report $^{75}$As Nuclear Magnetic Resonance data in a single crystal of CaFe$_2$As$_2$. The Knight shift, electric field gradient, and spin-lattice relaxation rate are strongly temperature dependent in the paramagnetic state, and change discontinuously at the structural transition temperature, $T_S=T_N=167$ K. Immediately below, the NMR spectra reveal an internal field at the As site associated with the presence of a commensurate magnetic order. These results indicate that the structural and magnetic transitions in CaFe$_2$As$_2$ are first order and strongly coupled, and that the electron d","authors_text":"E. D. Bauer, F. Ronning, J. D. Thompson, N. J. Curro, S.-H. Baek, T. Klimczuk","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-08-06T16:16:23Z","title":"First order magnetic transition in single crystal CaFe$_2$As$_2$ detected by $^{75}$As NMR"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.0744","kind":"arxiv","version":3},"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:e8a9a9c506202e05097ab3b88a425dc01be0a15126955a11955ee6389aaef1e2","target":"record","created_at":"2026-07-04T15:37:31Z","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":"98566eadd6b4a7781f258bd7018955b0c449f860af17a986a9c3487b66ba6f59","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-08-06T16:16:23Z","title_canon_sha256":"bd30e4b191eb45526c17237c87f54ba2261b3b2da0c520f1739ff61c717db521"},"schema_version":"1.0","source":{"id":"0808.0744","kind":"arxiv","version":3}},"canonical_sha256":"f88cdc766b7c232e2e82fefc75af7bd08d6d57bf477d7dd3fa38bc0b6c0adb27","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f88cdc766b7c232e2e82fefc75af7bd08d6d57bf477d7dd3fa38bc0b6c0adb27","first_computed_at":"2026-07-04T15:37:31.159628Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:37:31.159628Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vtOREysqlAGITaQAC5RdM91VsKjPU+t16xJLySaffmjVPJfSKHmptLFEETJi0cOfOztYrH/Yi9wbFDm9T6P0Bg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:37:31.160012Z","signed_message":"canonical_sha256_bytes"},"source_id":"0808.0744","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8a9a9c506202e05097ab3b88a425dc01be0a15126955a11955ee6389aaef1e2","sha256:83cb6fa17894d6ab5a909f93e0669cc1edc2fe85c4d8ccd622e2d021d92ebe7c"],"state_sha256":"96f27cff4907394e96db85b49f006151cbf9cc6c3d6737baa984ee7cf626a6fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JHsLxA3NTeqCAhLvKfonaw6luKyW7WWNCsR2CYKW7lVmfdC5y2AgLvwUSyL2M/2OtWjcodQdOvE1SME4PHx0DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T02:10:54.388703Z","bundle_sha256":"3364f9b9af08c97fb5adfa2f4a441322862f97ed62dfc6faf486f53636f6f2cd"}}