{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:C5VX2U6AUK3NOHEDZC3LNJKLDY","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":"426a09237d37b3ef43f03d92dd13a695573070d91150ee20ee00dab69c6ace43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-08-04T12:23:24Z","title_canon_sha256":"d2d4b46fc443dfb37db6a2a4d228e1267605365534cf732580916644b2c46557"},"schema_version":"1.0","source":{"id":"1008.0761","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.0761","created_at":"2026-05-18T04:06:45Z"},{"alias_kind":"arxiv_version","alias_value":"1008.0761v3","created_at":"2026-05-18T04:06:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.0761","created_at":"2026-05-18T04:06:45Z"},{"alias_kind":"pith_short_12","alias_value":"C5VX2U6AUK3N","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_16","alias_value":"C5VX2U6AUK3NOHED","created_at":"2026-05-18T12:26:05Z"},{"alias_kind":"pith_short_8","alias_value":"C5VX2U6A","created_at":"2026-05-18T12:26:05Z"}],"graph_snapshots":[{"event_id":"sha256:5d7f2ce1148c0832544584a912883294f092487a46f2c1dfeec42bc31249392d","target":"graph","created_at":"2026-05-18T04:06:45Z","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":"Using magnetron sputtering, we have prepared Co-Fe-B/tunnel barrier/Co-Fe-B magnetic tunnel junctions with tunnel barriers consisting of alumina, magnesia, and magnesia-alumina bilayer systems. The highest tunnel magnetoresistance ratios we found were 73% for alumina and 323% for magnesia-based tunnel junctions. Additionally, tunnel junctions with a unified layer stack were prepared for the three different barriers. In these systems, the tunnel magnetoresistance ratios at optimum annealing temperatures were found to be 65% for alumina, 173% for magnesia, and 78% for the composite tunnel barrie","authors_text":"Alexander Auge, Andy Thomas, G\\\"unter Reiss, Henning Schuhmann, Markus M\\\"unzenberg, Michael Seibt, Oliver Schebaum, Volker Drewello","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-08-04T12:23:24Z","title":"Tunnel magnetoresistance in alumina, magnesia and composite tunnel barrier magnetic tunnel junctions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.0761","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":"sha256:19d61b7b82cfa942c194a21e0aab75f5d7fd5f68e92add666599da1420723ead","target":"record","created_at":"2026-05-18T04:06:45Z","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":"426a09237d37b3ef43f03d92dd13a695573070d91150ee20ee00dab69c6ace43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-08-04T12:23:24Z","title_canon_sha256":"d2d4b46fc443dfb37db6a2a4d228e1267605365534cf732580916644b2c46557"},"schema_version":"1.0","source":{"id":"1008.0761","kind":"arxiv","version":3}},"canonical_sha256":"176b7d53c0a2b6d71c83c8b6b6a54b1e00d2f66daf60b873f0893b434f7d74c7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"176b7d53c0a2b6d71c83c8b6b6a54b1e00d2f66daf60b873f0893b434f7d74c7","first_computed_at":"2026-05-18T04:06:45.138439Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:06:45.138439Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OB4WTArwDX6wSpQYg95r+vK02GuqYvI1i3u09TmFEkXKXrNWQl09XsDHk8uHEnDxPMUKkxwZrH3dydiTC6e3BA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:06:45.139022Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.0761","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:19d61b7b82cfa942c194a21e0aab75f5d7fd5f68e92add666599da1420723ead","sha256:5d7f2ce1148c0832544584a912883294f092487a46f2c1dfeec42bc31249392d"],"state_sha256":"efb66b218cdf77ece97246c9e81b0539df4f20696ee14793158fa1fa51f3227c"}