{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:CWIIZZS34ROWGM52SNU3PFTFFJ","short_pith_number":"pith:CWIIZZS3","canonical_record":{"source":{"id":"1012.4089","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-18T13:13:42Z","cross_cats_sorted":[],"title_canon_sha256":"9a8a9b6fea0d195e5cf3b83b9d63bc300c3f13208a6b300276b6b4c5a69929da","abstract_canon_sha256":"7b759fabf982ed8e695735a73702dd6ff92d769201d1c37223da37b6cd02e53e"},"schema_version":"1.0"},"canonical_sha256":"15908ce65be45d6333ba9369b796652a4509050ed346ddc2e40d3f80fa931f17","source":{"kind":"arxiv","id":"1012.4089","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.4089","created_at":"2026-05-18T04:32:56Z"},{"alias_kind":"arxiv_version","alias_value":"1012.4089v1","created_at":"2026-05-18T04:32:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.4089","created_at":"2026-05-18T04:32:56Z"},{"alias_kind":"pith_short_12","alias_value":"CWIIZZS34ROW","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"CWIIZZS34ROWGM52","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"CWIIZZS3","created_at":"2026-05-18T12:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:CWIIZZS34ROWGM52SNU3PFTFFJ","target":"record","payload":{"canonical_record":{"source":{"id":"1012.4089","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-18T13:13:42Z","cross_cats_sorted":[],"title_canon_sha256":"9a8a9b6fea0d195e5cf3b83b9d63bc300c3f13208a6b300276b6b4c5a69929da","abstract_canon_sha256":"7b759fabf982ed8e695735a73702dd6ff92d769201d1c37223da37b6cd02e53e"},"schema_version":"1.0"},"canonical_sha256":"15908ce65be45d6333ba9369b796652a4509050ed346ddc2e40d3f80fa931f17","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:32:56.272523Z","signature_b64":"RFLcqal/eZVGetb2hOjBbXHcGSll9XBL7PYBmZOft7OsQU1/Q8AinHXs9+BPekP3F670WguosBDk08KNXnTsAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"15908ce65be45d6333ba9369b796652a4509050ed346ddc2e40d3f80fa931f17","last_reissued_at":"2026-05-18T04:32:56.271891Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:32:56.271891Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.4089","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":"2026-05-18T04:32:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hAvP5lxWAwk7q7p4BUlMyLlysvZXuhtqx475moQVViuQ+hby57W1jKsKAMASfA/YX4NVmpWkD89hEuWni2Q8CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T08:26:41.867775Z"},"content_sha256":"e1af5177f33f1f4003323372ecf9f7d5ef15f88b7aa784088939bd52e307a741","schema_version":"1.0","event_id":"sha256:e1af5177f33f1f4003323372ecf9f7d5ef15f88b7aa784088939bd52e307a741"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:CWIIZZS34ROWGM52SNU3PFTFFJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tunnel magnetoresistance of Fe3O4/MgO/Fe nanostructures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"E. M. Epshtein, G. M. Mikhailov, I. V. Malikov, P. E. Zilberman, S. G. Chigarev","submitted_at":"2010-12-18T13:13:42Z","abstract_excerpt":"A magnetic tunnel junction Fe3O4/MgO/Fe with (001) layer orientation is considered. The junction magnetic energy is analyzed as a function of the angle between the layer magnetization vectors under various magnetic fields. The tunnel magnetoresistance is calculated as a function of the external magnetic field. In contrast with junctions with unidirectional anisotropy, a substantially lower magnetic field is required for the junction switching."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.4089","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":""},"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":"2026-05-18T04:32:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a5vHNBj+n6Dro5OYIKJwfnFaVudNpAMXDC5QwLAIos3DVhyGnpN/hfP8kaauSucpLpj8HAEyqZEvgoKMd/PfCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T08:26:41.868511Z"},"content_sha256":"932b218b3d5544d44ccb6ce3c0e971086221cb0b14d3d10f2e017a7caed33205","schema_version":"1.0","event_id":"sha256:932b218b3d5544d44ccb6ce3c0e971086221cb0b14d3d10f2e017a7caed33205"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CWIIZZS34ROWGM52SNU3PFTFFJ/bundle.json","state_url":"https://pith.science/pith/CWIIZZS34ROWGM52SNU3PFTFFJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CWIIZZS34ROWGM52SNU3PFTFFJ/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":"2026-06-11T08:26:41Z","links":{"resolver":"https://pith.science/pith/CWIIZZS34ROWGM52SNU3PFTFFJ","bundle":"https://pith.science/pith/CWIIZZS34ROWGM52SNU3PFTFFJ/bundle.json","state":"https://pith.science/pith/CWIIZZS34ROWGM52SNU3PFTFFJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CWIIZZS34ROWGM52SNU3PFTFFJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:CWIIZZS34ROWGM52SNU3PFTFFJ","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":"7b759fabf982ed8e695735a73702dd6ff92d769201d1c37223da37b6cd02e53e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-18T13:13:42Z","title_canon_sha256":"9a8a9b6fea0d195e5cf3b83b9d63bc300c3f13208a6b300276b6b4c5a69929da"},"schema_version":"1.0","source":{"id":"1012.4089","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.4089","created_at":"2026-05-18T04:32:56Z"},{"alias_kind":"arxiv_version","alias_value":"1012.4089v1","created_at":"2026-05-18T04:32:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.4089","created_at":"2026-05-18T04:32:56Z"},{"alias_kind":"pith_short_12","alias_value":"CWIIZZS34ROW","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"CWIIZZS34ROWGM52","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"CWIIZZS3","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:932b218b3d5544d44ccb6ce3c0e971086221cb0b14d3d10f2e017a7caed33205","target":"graph","created_at":"2026-05-18T04:32:56Z","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":"A magnetic tunnel junction Fe3O4/MgO/Fe with (001) layer orientation is considered. The junction magnetic energy is analyzed as a function of the angle between the layer magnetization vectors under various magnetic fields. The tunnel magnetoresistance is calculated as a function of the external magnetic field. In contrast with junctions with unidirectional anisotropy, a substantially lower magnetic field is required for the junction switching.","authors_text":"E. M. Epshtein, G. M. Mikhailov, I. V. Malikov, P. E. Zilberman, S. G. Chigarev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-18T13:13:42Z","title":"Tunnel magnetoresistance of Fe3O4/MgO/Fe nanostructures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.4089","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:e1af5177f33f1f4003323372ecf9f7d5ef15f88b7aa784088939bd52e307a741","target":"record","created_at":"2026-05-18T04:32:56Z","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":"7b759fabf982ed8e695735a73702dd6ff92d769201d1c37223da37b6cd02e53e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-18T13:13:42Z","title_canon_sha256":"9a8a9b6fea0d195e5cf3b83b9d63bc300c3f13208a6b300276b6b4c5a69929da"},"schema_version":"1.0","source":{"id":"1012.4089","kind":"arxiv","version":1}},"canonical_sha256":"15908ce65be45d6333ba9369b796652a4509050ed346ddc2e40d3f80fa931f17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"15908ce65be45d6333ba9369b796652a4509050ed346ddc2e40d3f80fa931f17","first_computed_at":"2026-05-18T04:32:56.271891Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:32:56.271891Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RFLcqal/eZVGetb2hOjBbXHcGSll9XBL7PYBmZOft7OsQU1/Q8AinHXs9+BPekP3F670WguosBDk08KNXnTsAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:32:56.272523Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.4089","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e1af5177f33f1f4003323372ecf9f7d5ef15f88b7aa784088939bd52e307a741","sha256:932b218b3d5544d44ccb6ce3c0e971086221cb0b14d3d10f2e017a7caed33205"],"state_sha256":"2520010cf781a0e29cf2b91fb85fbd4947b87b7402b8c4a163c3f3fe82fdaf6d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uMIExxzva47dsklVkIqoHM3Csz5U3EvMueRYJHpejZ+lz9loJy0+UfqplbdbxXv4qLijvi5Shar4wjPvUYgIAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T08:26:41.872776Z","bundle_sha256":"b2200c1049a04cf627e19b4fdf704f82a9a63198766230f54b26a5d0c02a7c7d"}}