{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:HK3ON2VK2MX7H2XBVFR7GNDR5S","short_pith_number":"pith:HK3ON2VK","canonical_record":{"source":{"id":"1304.2509","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-04-09T10:16:36Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d2bde99e27ba2fdb1f7281d12a0209e923f34d1bf2fd1290b4c5b45675674950","abstract_canon_sha256":"0c3286f2ae5bcdecac5b81fba419e385843e8af5154311e9e8ec5128186cc4e3"},"schema_version":"1.0"},"canonical_sha256":"3ab6e6eaaad32ff3eae1a963f33471eca0ae0df9e8815fa68c12299e47461e9a","source":{"kind":"arxiv","id":"1304.2509","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.2509","created_at":"2026-05-18T01:36:04Z"},{"alias_kind":"arxiv_version","alias_value":"1304.2509v2","created_at":"2026-05-18T01:36:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.2509","created_at":"2026-05-18T01:36:04Z"},{"alias_kind":"pith_short_12","alias_value":"HK3ON2VK2MX7","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HK3ON2VK2MX7H2XB","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HK3ON2VK","created_at":"2026-05-18T12:27:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:HK3ON2VK2MX7H2XBVFR7GNDR5S","target":"record","payload":{"canonical_record":{"source":{"id":"1304.2509","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-04-09T10:16:36Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d2bde99e27ba2fdb1f7281d12a0209e923f34d1bf2fd1290b4c5b45675674950","abstract_canon_sha256":"0c3286f2ae5bcdecac5b81fba419e385843e8af5154311e9e8ec5128186cc4e3"},"schema_version":"1.0"},"canonical_sha256":"3ab6e6eaaad32ff3eae1a963f33471eca0ae0df9e8815fa68c12299e47461e9a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:36:04.226205Z","signature_b64":"ipapRddCjvuWqDG3LA6fOVimnxLXFdUOQdeN0SVq1WupvLHI8BJnULV2Tad3asiptD5KtD10imkCCBDrx4KpBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ab6e6eaaad32ff3eae1a963f33471eca0ae0df9e8815fa68c12299e47461e9a","last_reissued_at":"2026-05-18T01:36:04.225673Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:36:04.225673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.2509","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:36:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wLb0jCXoy3W+ltFu1FMJTc9ZqZ4NUqk3Qpq+kQzdA/4Ocl/oK7D9IF3B/7MHIRgulJ+8cOZbL9jP/URdbEOUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T06:28:09.519361Z"},"content_sha256":"aec9300b70f1011ffb61965573cf857fc4074a5bf3c2c67e00bf8d0a584caf26","schema_version":"1.0","event_id":"sha256:aec9300b70f1011ffb61965573cf857fc4074a5bf3c2c67e00bf8d0a584caf26"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:HK3ON2VK2MX7H2XBVFR7GNDR5S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tuning the Ultrafast Spin Dynamics in Carrier-Density-Controlled Ferromagnets","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.str-el","authors_text":"Alexander Melville, Alexander Schroer, Andreas Schmehl, Carsten Becher, Darrell G. Schlom, Jochen Mannhart, Johann Kroha, Manfred Fiebig, Masakazu Matsubara, Mauricio Trujillo Martinez","submitted_at":"2013-04-09T10:16:36Z","abstract_excerpt":"Ultrafast strengthening or quenching of the ferromagnetic order of semiconducting Eu1-xGdxO was achieved by resonant photoexcitation. The modification of the magnetic order is established within 3 ps as revealed by optical second harmonic generation. A theoretical analysis shows that the response is determined by the interplay of chemically and optically generated carriers in a nonequilibrium scenario beyond the three-temperature model. General criteria for the design of spintronics materials with tunable ultrafast spin dynamics are given."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.2509","kind":"arxiv","version":2},"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":"2026-05-18T01:36:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qgkf6T7lh3VvDnWkQXGXNeNlYJrDiDwpPmzruqaRbKI1QJnBGEaUDXwGd45ZjImWjHcLE37INH5xHc0SJrkyBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T06:28:09.519721Z"},"content_sha256":"e6f27111c6acb0db6bad6be7de744343e85e35479ac8266ac8ad580ebfb925bf","schema_version":"1.0","event_id":"sha256:e6f27111c6acb0db6bad6be7de744343e85e35479ac8266ac8ad580ebfb925bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HK3ON2VK2MX7H2XBVFR7GNDR5S/bundle.json","state_url":"https://pith.science/pith/HK3ON2VK2MX7H2XBVFR7GNDR5S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HK3ON2VK2MX7H2XBVFR7GNDR5S/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":"2026-06-25T06:28:09Z","links":{"resolver":"https://pith.science/pith/HK3ON2VK2MX7H2XBVFR7GNDR5S","bundle":"https://pith.science/pith/HK3ON2VK2MX7H2XBVFR7GNDR5S/bundle.json","state":"https://pith.science/pith/HK3ON2VK2MX7H2XBVFR7GNDR5S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HK3ON2VK2MX7H2XBVFR7GNDR5S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HK3ON2VK2MX7H2XBVFR7GNDR5S","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":"0c3286f2ae5bcdecac5b81fba419e385843e8af5154311e9e8ec5128186cc4e3","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-04-09T10:16:36Z","title_canon_sha256":"d2bde99e27ba2fdb1f7281d12a0209e923f34d1bf2fd1290b4c5b45675674950"},"schema_version":"1.0","source":{"id":"1304.2509","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.2509","created_at":"2026-05-18T01:36:04Z"},{"alias_kind":"arxiv_version","alias_value":"1304.2509v2","created_at":"2026-05-18T01:36:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.2509","created_at":"2026-05-18T01:36:04Z"},{"alias_kind":"pith_short_12","alias_value":"HK3ON2VK2MX7","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HK3ON2VK2MX7H2XB","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HK3ON2VK","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:e6f27111c6acb0db6bad6be7de744343e85e35479ac8266ac8ad580ebfb925bf","target":"graph","created_at":"2026-05-18T01:36:04Z","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":"Ultrafast strengthening or quenching of the ferromagnetic order of semiconducting Eu1-xGdxO was achieved by resonant photoexcitation. The modification of the magnetic order is established within 3 ps as revealed by optical second harmonic generation. A theoretical analysis shows that the response is determined by the interplay of chemically and optically generated carriers in a nonequilibrium scenario beyond the three-temperature model. General criteria for the design of spintronics materials with tunable ultrafast spin dynamics are given.","authors_text":"Alexander Melville, Alexander Schroer, Andreas Schmehl, Carsten Becher, Darrell G. Schlom, Jochen Mannhart, Johann Kroha, Manfred Fiebig, Masakazu Matsubara, Mauricio Trujillo Martinez","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-04-09T10:16:36Z","title":"Tuning the Ultrafast Spin Dynamics in Carrier-Density-Controlled Ferromagnets"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.2509","kind":"arxiv","version":2},"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:aec9300b70f1011ffb61965573cf857fc4074a5bf3c2c67e00bf8d0a584caf26","target":"record","created_at":"2026-05-18T01:36:04Z","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":"0c3286f2ae5bcdecac5b81fba419e385843e8af5154311e9e8ec5128186cc4e3","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-04-09T10:16:36Z","title_canon_sha256":"d2bde99e27ba2fdb1f7281d12a0209e923f34d1bf2fd1290b4c5b45675674950"},"schema_version":"1.0","source":{"id":"1304.2509","kind":"arxiv","version":2}},"canonical_sha256":"3ab6e6eaaad32ff3eae1a963f33471eca0ae0df9e8815fa68c12299e47461e9a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ab6e6eaaad32ff3eae1a963f33471eca0ae0df9e8815fa68c12299e47461e9a","first_computed_at":"2026-05-18T01:36:04.225673Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:36:04.225673Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ipapRddCjvuWqDG3LA6fOVimnxLXFdUOQdeN0SVq1WupvLHI8BJnULV2Tad3asiptD5KtD10imkCCBDrx4KpBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:36:04.226205Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.2509","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aec9300b70f1011ffb61965573cf857fc4074a5bf3c2c67e00bf8d0a584caf26","sha256:e6f27111c6acb0db6bad6be7de744343e85e35479ac8266ac8ad580ebfb925bf"],"state_sha256":"724c3a4166768870e270c75c40ecc79f68a6eccec34f71e18c4d78acffaf5585"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l/jstvq4vfb+JxkJrmg+KCFzrTtKvvadu80K6JfOhbmFUchG7Xu23JYUJNI30tmbriPdqzE2sdfGSlWog07LCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T06:28:09.521705Z","bundle_sha256":"8f878b8a8e4692bd006964166f5e3783f8012e63fab244416dbde950a84a0e6b"}}