{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:K6JZEUTYAFB6RVS4FDHSXZGWWY","short_pith_number":"pith:K6JZEUTY","canonical_record":{"source":{"id":"1412.7356","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-12-23T13:12:41Z","cross_cats_sorted":[],"title_canon_sha256":"3c85fd30c9b2ec4cc96245116dd1f9afd3cdbd86fd5db726dd870b3ab1416f4d","abstract_canon_sha256":"82b98587d8af9a0e09a00c6612d3bef804217b7260b98a49fae3db64df2d1b7b"},"schema_version":"1.0"},"canonical_sha256":"57939252780143e8d65c28cf2be4d6b63c69dfbdd68607246f4d9829840f51dc","source":{"kind":"arxiv","id":"1412.7356","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.7356","created_at":"2026-05-18T02:19:07Z"},{"alias_kind":"arxiv_version","alias_value":"1412.7356v2","created_at":"2026-05-18T02:19:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.7356","created_at":"2026-05-18T02:19:07Z"},{"alias_kind":"pith_short_12","alias_value":"K6JZEUTYAFB6","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"K6JZEUTYAFB6RVS4","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"K6JZEUTY","created_at":"2026-05-18T12:28:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:K6JZEUTYAFB6RVS4FDHSXZGWWY","target":"record","payload":{"canonical_record":{"source":{"id":"1412.7356","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-12-23T13:12:41Z","cross_cats_sorted":[],"title_canon_sha256":"3c85fd30c9b2ec4cc96245116dd1f9afd3cdbd86fd5db726dd870b3ab1416f4d","abstract_canon_sha256":"82b98587d8af9a0e09a00c6612d3bef804217b7260b98a49fae3db64df2d1b7b"},"schema_version":"1.0"},"canonical_sha256":"57939252780143e8d65c28cf2be4d6b63c69dfbdd68607246f4d9829840f51dc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:19:07.928700Z","signature_b64":"3ZwQLr83LujcFzroYRLUwWrZ8rq3Ui5tZ+MeMvW2O4sC8ibV4xQMpyanyEHxBe6YgPu5LAFTWs4OJBJPoUMhDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"57939252780143e8d65c28cf2be4d6b63c69dfbdd68607246f4d9829840f51dc","last_reissued_at":"2026-05-18T02:19:07.928078Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:19:07.928078Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.7356","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":"2026-05-18T02:19:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0aU52sns3SOXSQboG7pzQNKQo16ni1S5nwLoRmDRO2SDy0cLfhOyagj9cDYZkm+06wUu0jgZdLGGybVEq2uSAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:47:01.183210Z"},"content_sha256":"8debea67ac3f50e940163595635cd08facb3bad9f3a38c004f860a9b575c8be2","schema_version":"1.0","event_id":"sha256:8debea67ac3f50e940163595635cd08facb3bad9f3a38c004f860a9b575c8be2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:K6JZEUTYAFB6RVS4FDHSXZGWWY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sign change in the tunnel magnetoresistance of Fe3O4/MgO/Co-Fe-B magnetic tunnel junctions depending on the annealing temperature and the interface treatment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Andreas Krampf, Andy Thomas, Christoph Klewe, Daniel Meier, G\\\"unter Reiss, Joachim Wollschl\\\"ager, Karsten Kuepper, Karsten Rott, Luca Marnitz, Matth\\\"aus Witziok, Olga Kuschel, Savio Fabretti, Stefan Nieh\\\"orster, Timo Kuschel, Tobias Schemme","submitted_at":"2014-12-23T13:12:41Z","abstract_excerpt":"Magnetite (Fe3O4) is an eligible candidate for magnetic tunnel junctions (MTJs) since it shows a high spin polarization at the Fermi level as well as a high Curie temperature of 585{\\deg}C. In this study, Fe3O4/MgO/Co-Fe-B MTJs were manufactured. A sign change in the TMR is observed after annealing the MTJs at temperatures between 200{\\deg}C and 280{\\deg}C. Our findings suggest an Mg interdiffusion from the MgO barrier into the Fe3O4 as the reason for the change of the TMR. Additionally, different treatments of the magnetite interface (argon bombardment, annealing at 200{\\deg}C in oxygen atmos"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.7356","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":"2026-05-18T02:19:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R91Y/nTFWSndjTpbD6p9HELJHPTcaJus0gDg8f7leyurBAG+EuzMFxO7PgMA7nR5sjHGgmN9dRLGVm1gpjDCCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:47:01.183597Z"},"content_sha256":"cf85101406c6e86911167bc1cbc104479d031148d047feb7f39e985701ea87ea","schema_version":"1.0","event_id":"sha256:cf85101406c6e86911167bc1cbc104479d031148d047feb7f39e985701ea87ea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K6JZEUTYAFB6RVS4FDHSXZGWWY/bundle.json","state_url":"https://pith.science/pith/K6JZEUTYAFB6RVS4FDHSXZGWWY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K6JZEUTYAFB6RVS4FDHSXZGWWY/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":"2026-05-26T19:47:01Z","links":{"resolver":"https://pith.science/pith/K6JZEUTYAFB6RVS4FDHSXZGWWY","bundle":"https://pith.science/pith/K6JZEUTYAFB6RVS4FDHSXZGWWY/bundle.json","state":"https://pith.science/pith/K6JZEUTYAFB6RVS4FDHSXZGWWY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K6JZEUTYAFB6RVS4FDHSXZGWWY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:K6JZEUTYAFB6RVS4FDHSXZGWWY","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":"82b98587d8af9a0e09a00c6612d3bef804217b7260b98a49fae3db64df2d1b7b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-12-23T13:12:41Z","title_canon_sha256":"3c85fd30c9b2ec4cc96245116dd1f9afd3cdbd86fd5db726dd870b3ab1416f4d"},"schema_version":"1.0","source":{"id":"1412.7356","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.7356","created_at":"2026-05-18T02:19:07Z"},{"alias_kind":"arxiv_version","alias_value":"1412.7356v2","created_at":"2026-05-18T02:19:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.7356","created_at":"2026-05-18T02:19:07Z"},{"alias_kind":"pith_short_12","alias_value":"K6JZEUTYAFB6","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"K6JZEUTYAFB6RVS4","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"K6JZEUTY","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:cf85101406c6e86911167bc1cbc104479d031148d047feb7f39e985701ea87ea","target":"graph","created_at":"2026-05-18T02:19:07Z","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":"Magnetite (Fe3O4) is an eligible candidate for magnetic tunnel junctions (MTJs) since it shows a high spin polarization at the Fermi level as well as a high Curie temperature of 585{\\deg}C. In this study, Fe3O4/MgO/Co-Fe-B MTJs were manufactured. A sign change in the TMR is observed after annealing the MTJs at temperatures between 200{\\deg}C and 280{\\deg}C. Our findings suggest an Mg interdiffusion from the MgO barrier into the Fe3O4 as the reason for the change of the TMR. Additionally, different treatments of the magnetite interface (argon bombardment, annealing at 200{\\deg}C in oxygen atmos","authors_text":"Andreas Krampf, Andy Thomas, Christoph Klewe, Daniel Meier, G\\\"unter Reiss, Joachim Wollschl\\\"ager, Karsten Kuepper, Karsten Rott, Luca Marnitz, Matth\\\"aus Witziok, Olga Kuschel, Savio Fabretti, Stefan Nieh\\\"orster, Timo Kuschel, Tobias Schemme","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-12-23T13:12:41Z","title":"Sign change in the tunnel magnetoresistance of Fe3O4/MgO/Co-Fe-B magnetic tunnel junctions depending on the annealing temperature and the interface treatment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.7356","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":"sha256:8debea67ac3f50e940163595635cd08facb3bad9f3a38c004f860a9b575c8be2","target":"record","created_at":"2026-05-18T02:19:07Z","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":"82b98587d8af9a0e09a00c6612d3bef804217b7260b98a49fae3db64df2d1b7b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-12-23T13:12:41Z","title_canon_sha256":"3c85fd30c9b2ec4cc96245116dd1f9afd3cdbd86fd5db726dd870b3ab1416f4d"},"schema_version":"1.0","source":{"id":"1412.7356","kind":"arxiv","version":2}},"canonical_sha256":"57939252780143e8d65c28cf2be4d6b63c69dfbdd68607246f4d9829840f51dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"57939252780143e8d65c28cf2be4d6b63c69dfbdd68607246f4d9829840f51dc","first_computed_at":"2026-05-18T02:19:07.928078Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:07.928078Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3ZwQLr83LujcFzroYRLUwWrZ8rq3Ui5tZ+MeMvW2O4sC8ibV4xQMpyanyEHxBe6YgPu5LAFTWs4OJBJPoUMhDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:07.928700Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.7356","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8debea67ac3f50e940163595635cd08facb3bad9f3a38c004f860a9b575c8be2","sha256:cf85101406c6e86911167bc1cbc104479d031148d047feb7f39e985701ea87ea"],"state_sha256":"e2caab380f995dce81d1c6f1cd069e4ee8b9cf59d6cd78196d262d4f8d69ddf4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z3DZtCRjJIH0QCI9fwomL0MDnEY26tf5j5QvQFUaj778pcqiHVfiTVp/cY0P4aRKW4gfaIlSiBoFCRvuNkC+CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T19:47:01.186615Z","bundle_sha256":"075a80e0ec6618b755c2f6ed34c45774deca698e43101cc950b49ceab9ae7f0f"}}