{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:T5PBH7DGZHJERYZYUWSV2T2WWD","short_pith_number":"pith:T5PBH7DG","canonical_record":{"source":{"id":"2005.05166","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-05-11T14:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"75eabe7753bc78977cd18637c368bec5e0bf282eaa502fb17d15bcbe03769476","abstract_canon_sha256":"c875871bdd1e42de1764e61f358eb2b6c71c0eb68225146f2433010e5c9555ad"},"schema_version":"1.0"},"canonical_sha256":"9f5e13fc66c9d248e338a5a55d4f56b0e50869675f03ca0adb59cc8ae1cb63a0","source":{"kind":"arxiv","id":"2005.05166","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.05166","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"arxiv_version","alias_value":"2005.05166v1","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.05166","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"pith_short_12","alias_value":"T5PBH7DGZHJE","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"pith_short_16","alias_value":"T5PBH7DGZHJERYZY","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"pith_short_8","alias_value":"T5PBH7DG","created_at":"2026-07-05T01:01:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:T5PBH7DGZHJERYZYUWSV2T2WWD","target":"record","payload":{"canonical_record":{"source":{"id":"2005.05166","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-05-11T14:58:44Z","cross_cats_sorted":[],"title_canon_sha256":"75eabe7753bc78977cd18637c368bec5e0bf282eaa502fb17d15bcbe03769476","abstract_canon_sha256":"c875871bdd1e42de1764e61f358eb2b6c71c0eb68225146f2433010e5c9555ad"},"schema_version":"1.0"},"canonical_sha256":"9f5e13fc66c9d248e338a5a55d4f56b0e50869675f03ca0adb59cc8ae1cb63a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:01:57.717674Z","signature_b64":"plf7FdCQE7RLbouS6SlDnA5n+MmpB/KBXYPdIm6SCg1PdtHMTA0oBAUL/tx8SiPDIT7u2x1Ahs0SpC1RAQMrDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f5e13fc66c9d248e338a5a55d4f56b0e50869675f03ca0adb59cc8ae1cb63a0","last_reissued_at":"2026-07-05T01:01:57.717285Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:01:57.717285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2005.05166","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":"2026-07-05T01:01:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d3tWUWvXkWinsAZb0WJg8mwz9ezBqpf8uZ6LoLhlYFkAN7AZogudxlN5yxFv/CgfVAKREZFjnKczg5EzMI6KBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T11:56:29.854653Z"},"content_sha256":"8361d2902e01ba4233044ca82c8033615811952c567903ff81ede2c69aae0df2","schema_version":"1.0","event_id":"sha256:8361d2902e01ba4233044ca82c8033615811952c567903ff81ede2c69aae0df2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:T5PBH7DGZHJERYZYUWSV2T2WWD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improving thermal stability of MnN/CoFeB exchange bias systems by optimizing the Ta buffer layer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Mareike Dunz, Markus Meinert","submitted_at":"2020-05-11T14:58:44Z","abstract_excerpt":"We investigated the influence of the Ta buffer layer on the thermal stability of polycrystalline Ta/ MnN/ CoFeB exchange bias systems, showing high exchange bias of about 1800 Oe at room temperature. The thermal stability of those trilayer systems is limited by nitrogen diffusion that occurs during annealing processes. Most of the nitrogen diffuses into the Ta buffer layer, which is necessary for good crystal growth of MnN and thus a crucial component of the exchange bias system. In order to improve the thermal stability, we prepared exchange bias stacks where we varied the Ta thickness to loo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.05166","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2005.05166/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":"2026-07-05T01:01:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iGapkg7CQt6MtJzTVzJ/k2uIuAbr9TpSFV0AF0hHpcv6nprppHvjN6SuI5n6ehqtQQKB4c8DNk2NgoWGFl/4AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T11:56:29.855016Z"},"content_sha256":"f3a24c3c2d79e5a79f40caf41f40187e52509897ab8982913e90ab2bbc16221a","schema_version":"1.0","event_id":"sha256:f3a24c3c2d79e5a79f40caf41f40187e52509897ab8982913e90ab2bbc16221a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T5PBH7DGZHJERYZYUWSV2T2WWD/bundle.json","state_url":"https://pith.science/pith/T5PBH7DGZHJERYZYUWSV2T2WWD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T5PBH7DGZHJERYZYUWSV2T2WWD/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":"2026-07-05T11:56:29Z","links":{"resolver":"https://pith.science/pith/T5PBH7DGZHJERYZYUWSV2T2WWD","bundle":"https://pith.science/pith/T5PBH7DGZHJERYZYUWSV2T2WWD/bundle.json","state":"https://pith.science/pith/T5PBH7DGZHJERYZYUWSV2T2WWD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T5PBH7DGZHJERYZYUWSV2T2WWD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:T5PBH7DGZHJERYZYUWSV2T2WWD","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":"c875871bdd1e42de1764e61f358eb2b6c71c0eb68225146f2433010e5c9555ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-05-11T14:58:44Z","title_canon_sha256":"75eabe7753bc78977cd18637c368bec5e0bf282eaa502fb17d15bcbe03769476"},"schema_version":"1.0","source":{"id":"2005.05166","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.05166","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"arxiv_version","alias_value":"2005.05166v1","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.05166","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"pith_short_12","alias_value":"T5PBH7DGZHJE","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"pith_short_16","alias_value":"T5PBH7DGZHJERYZY","created_at":"2026-07-05T01:01:57Z"},{"alias_kind":"pith_short_8","alias_value":"T5PBH7DG","created_at":"2026-07-05T01:01:57Z"}],"graph_snapshots":[{"event_id":"sha256:f3a24c3c2d79e5a79f40caf41f40187e52509897ab8982913e90ab2bbc16221a","target":"graph","created_at":"2026-07-05T01:01:57Z","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/2005.05166/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigated the influence of the Ta buffer layer on the thermal stability of polycrystalline Ta/ MnN/ CoFeB exchange bias systems, showing high exchange bias of about 1800 Oe at room temperature. The thermal stability of those trilayer systems is limited by nitrogen diffusion that occurs during annealing processes. Most of the nitrogen diffuses into the Ta buffer layer, which is necessary for good crystal growth of MnN and thus a crucial component of the exchange bias system. In order to improve the thermal stability, we prepared exchange bias stacks where we varied the Ta thickness to loo","authors_text":"Mareike Dunz, Markus Meinert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-05-11T14:58:44Z","title":"Improving thermal stability of MnN/CoFeB exchange bias systems by optimizing the Ta buffer layer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.05166","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":"sha256:8361d2902e01ba4233044ca82c8033615811952c567903ff81ede2c69aae0df2","target":"record","created_at":"2026-07-05T01:01:57Z","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":"c875871bdd1e42de1764e61f358eb2b6c71c0eb68225146f2433010e5c9555ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-05-11T14:58:44Z","title_canon_sha256":"75eabe7753bc78977cd18637c368bec5e0bf282eaa502fb17d15bcbe03769476"},"schema_version":"1.0","source":{"id":"2005.05166","kind":"arxiv","version":1}},"canonical_sha256":"9f5e13fc66c9d248e338a5a55d4f56b0e50869675f03ca0adb59cc8ae1cb63a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f5e13fc66c9d248e338a5a55d4f56b0e50869675f03ca0adb59cc8ae1cb63a0","first_computed_at":"2026-07-05T01:01:57.717285Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:01:57.717285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"plf7FdCQE7RLbouS6SlDnA5n+MmpB/KBXYPdIm6SCg1PdtHMTA0oBAUL/tx8SiPDIT7u2x1Ahs0SpC1RAQMrDw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:01:57.717674Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.05166","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8361d2902e01ba4233044ca82c8033615811952c567903ff81ede2c69aae0df2","sha256:f3a24c3c2d79e5a79f40caf41f40187e52509897ab8982913e90ab2bbc16221a"],"state_sha256":"597008e419620668111a6b293d3ac8690480c46f9407f19de05156be2d591e07"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4+EhWj9EmYTs2bItVvd/ogG/Puoo9aMqmt0Vxme1Lxx8/IUGOub+Jja7vAbjapcEcEdeiZUY+l1uXieyukDHCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T11:56:29.857061Z","bundle_sha256":"8f9041593c3ab1565c6473682f4e1674b07542010d4be63930c0ca4d56724b22"}}