{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:4KSGVC7JNH6UUFXPYSL4KUBPN6","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":"2fa21e3b0babeac10b6adb04fedc7d917a6b07087168db3054e025d49c010d8a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-06-18T12:21:38Z","title_canon_sha256":"c02441f7f69e26e03f69f057e4fa45861037a8c814851809c4d96a67edec8303"},"schema_version":"1.0","source":{"id":"0806.2978","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0806.2978","created_at":"2026-07-04T17:11:19Z"},{"alias_kind":"arxiv_version","alias_value":"0806.2978v1","created_at":"2026-07-04T17:11:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.2978","created_at":"2026-07-04T17:11:19Z"},{"alias_kind":"pith_short_12","alias_value":"4KSGVC7JNH6U","created_at":"2026-07-04T17:11:19Z"},{"alias_kind":"pith_short_16","alias_value":"4KSGVC7JNH6UUFXP","created_at":"2026-07-04T17:11:19Z"},{"alias_kind":"pith_short_8","alias_value":"4KSGVC7J","created_at":"2026-07-04T17:11:19Z"}],"graph_snapshots":[{"event_id":"sha256:66ec0fc06215844bba55bb32c598f9303a724fbf793fb7f82f5f5c26131baaa2","target":"graph","created_at":"2026-07-04T17:11:19Z","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/0806.2978/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Spin valve systems based on the giant magnetoresistive (GMR) effect as used for example in hard disks and automotive applications consist of several functional metallic thin film layers. We have identified by secondary ion mass spectrometry (SIMS) two main degradation mechanisms: One is related to oxygen diffusion through a protective cap layer, and the other one is interdiffusion directly at the functional layers of the GMR stack. By choosing a suitable material as cap layer (TaN), the oxidation effect can be suppressed.","authors_text":"J. Zimmer, K. Pruegl, L. Alff, M. Hawraneck, S. Flege, S. Schmitt, T. Bever, W. Raberg","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-06-18T12:21:38Z","title":"Diffusion based degradation mechanisms in giant magnetoresistive spin valves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.2978","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:e2e3a41ea57f9b9ddbfb52c96b4f2e8af8f9b8aa32771fa6ed247c81bb737951","target":"record","created_at":"2026-07-04T17:11:19Z","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":"2fa21e3b0babeac10b6adb04fedc7d917a6b07087168db3054e025d49c010d8a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-06-18T12:21:38Z","title_canon_sha256":"c02441f7f69e26e03f69f057e4fa45861037a8c814851809c4d96a67edec8303"},"schema_version":"1.0","source":{"id":"0806.2978","kind":"arxiv","version":1}},"canonical_sha256":"e2a46a8be969fd4a16efc497c5502f6fadc23356e3a25afc93c7c87b871e719d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e2a46a8be969fd4a16efc497c5502f6fadc23356e3a25afc93c7c87b871e719d","first_computed_at":"2026-07-04T17:11:19.580469Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:11:19.580469Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Qo4qSKYEDIXxALCm3GINEKDfuZu2M41dcJzX88DwdWFNQgAinnwdvzGee8gx1sP3lfjWl6MhN8PgvfR6PT24CQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:11:19.580810Z","signed_message":"canonical_sha256_bytes"},"source_id":"0806.2978","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e2e3a41ea57f9b9ddbfb52c96b4f2e8af8f9b8aa32771fa6ed247c81bb737951","sha256:66ec0fc06215844bba55bb32c598f9303a724fbf793fb7f82f5f5c26131baaa2"],"state_sha256":"e3cc7230ec0fbafafd92f1f8b1993a6a90078fc31dffaeed3221f90d16f2d9ca"}