{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:YKMT5NI74IVHELDOTCAM4HSYMM","short_pith_number":"pith:YKMT5NI7","canonical_record":{"source":{"id":"1611.03606","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-11T08:20:48Z","cross_cats_sorted":[],"title_canon_sha256":"3a60dc3dcc39fcf23b6f76df8c0e8d44685c36bf749ca06417f72266c1c7426b","abstract_canon_sha256":"54169760726485db25a244bfc20fb34e926e4b3c91a4a6dd6cfeb4054b99857f"},"schema_version":"1.0"},"canonical_sha256":"c2993eb51fe22a722c6e9880ce1e586317db53b84bf747622c07dbb48d9072bd","source":{"kind":"arxiv","id":"1611.03606","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.03606","created_at":"2026-05-18T00:47:08Z"},{"alias_kind":"arxiv_version","alias_value":"1611.03606v1","created_at":"2026-05-18T00:47:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.03606","created_at":"2026-05-18T00:47:08Z"},{"alias_kind":"pith_short_12","alias_value":"YKMT5NI74IVH","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YKMT5NI74IVHELDO","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YKMT5NI7","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:YKMT5NI74IVHELDOTCAM4HSYMM","target":"record","payload":{"canonical_record":{"source":{"id":"1611.03606","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-11T08:20:48Z","cross_cats_sorted":[],"title_canon_sha256":"3a60dc3dcc39fcf23b6f76df8c0e8d44685c36bf749ca06417f72266c1c7426b","abstract_canon_sha256":"54169760726485db25a244bfc20fb34e926e4b3c91a4a6dd6cfeb4054b99857f"},"schema_version":"1.0"},"canonical_sha256":"c2993eb51fe22a722c6e9880ce1e586317db53b84bf747622c07dbb48d9072bd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:08.812929Z","signature_b64":"JR2/TFbMdxsFQXHRu81efG/sVKI/bAwkd168+dlmV/H6hP5dOd5sfejjwmsRNkUa708bwREDI8gmk41hPcldBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c2993eb51fe22a722c6e9880ce1e586317db53b84bf747622c07dbb48d9072bd","last_reissued_at":"2026-05-18T00:47:08.812265Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:08.812265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.03606","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":"2026-05-18T00:47:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9POdHpyGJBkeBibmK7UDzmocoZu2/XPUTcRwOFnEK4bbYJNpfVsShdzd5Cnh6IhtAmwmqBfCZxFeC5p1RLUlBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:43:58.621083Z"},"content_sha256":"d5110fe17d1cc2d1dadc3b10d07de3535c20a87629faf925a17ee60f7be1bfe6","schema_version":"1.0","event_id":"sha256:d5110fe17d1cc2d1dadc3b10d07de3535c20a87629faf925a17ee60f7be1bfe6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:YKMT5NI74IVHELDOTCAM4HSYMM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"MgGa2O4 spinel barrier for magnetic tunnel junctions: coherent tunneling and low barrier height","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Hiroaki Sukegawa, Hiroaki Yoda, Junichi Ito, Kazuhiro Hono, Mohamed Belmoubarik, Naoharu Shimomura, P.-H. Cheng, Seiji Mitani, Tadakatsu Ohkubo, Tadaomi Daibou, Yushi Kato, Yuuzo Kamiguchi","submitted_at":"2016-11-11T08:20:48Z","abstract_excerpt":"Epitaxial Fe/magnesium gallium spinel oxide (MgGa2O4)/Fe(001) magnetic tunnel junctions (MTJs) were fabricated by magnetron sputtering. Tunnel magnetoresistance (TMR) ratio up to 121% at room temperature (196% at 4 K) was observed, suggesting a TMR enhancement by the coherent tunneling effect in the MgGa2O4 barrier. The MgGa2O4 layer had a spinel structure and it showed good lattice matching with the Fe layers owing to slight tetragonal lattice distortion of MgGa2O4. Barrier thickness dependence of the tunneling resistance and current-voltage characteristics revealed that the barrier height of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03606","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":"2026-05-18T00:47:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"prRfDkntrjPxEqAeEsljIb4Ag/sV8Ev42/Qt9jqLZRar0z+lMQoE+yEmriIlHDwcTrIHO0slgxDc5Wl4q/pHCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T00:43:58.621461Z"},"content_sha256":"d503486d276f5aae9da4afa5e29e636a6028ac3a690c53f595d698de2ca5a1fa","schema_version":"1.0","event_id":"sha256:d503486d276f5aae9da4afa5e29e636a6028ac3a690c53f595d698de2ca5a1fa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YKMT5NI74IVHELDOTCAM4HSYMM/bundle.json","state_url":"https://pith.science/pith/YKMT5NI74IVHELDOTCAM4HSYMM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YKMT5NI74IVHELDOTCAM4HSYMM/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":"2026-05-31T00:43:58Z","links":{"resolver":"https://pith.science/pith/YKMT5NI74IVHELDOTCAM4HSYMM","bundle":"https://pith.science/pith/YKMT5NI74IVHELDOTCAM4HSYMM/bundle.json","state":"https://pith.science/pith/YKMT5NI74IVHELDOTCAM4HSYMM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YKMT5NI74IVHELDOTCAM4HSYMM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:YKMT5NI74IVHELDOTCAM4HSYMM","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":"54169760726485db25a244bfc20fb34e926e4b3c91a4a6dd6cfeb4054b99857f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-11T08:20:48Z","title_canon_sha256":"3a60dc3dcc39fcf23b6f76df8c0e8d44685c36bf749ca06417f72266c1c7426b"},"schema_version":"1.0","source":{"id":"1611.03606","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.03606","created_at":"2026-05-18T00:47:08Z"},{"alias_kind":"arxiv_version","alias_value":"1611.03606v1","created_at":"2026-05-18T00:47:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.03606","created_at":"2026-05-18T00:47:08Z"},{"alias_kind":"pith_short_12","alias_value":"YKMT5NI74IVH","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YKMT5NI74IVHELDO","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YKMT5NI7","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:d503486d276f5aae9da4afa5e29e636a6028ac3a690c53f595d698de2ca5a1fa","target":"graph","created_at":"2026-05-18T00:47:08Z","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":"Epitaxial Fe/magnesium gallium spinel oxide (MgGa2O4)/Fe(001) magnetic tunnel junctions (MTJs) were fabricated by magnetron sputtering. Tunnel magnetoresistance (TMR) ratio up to 121% at room temperature (196% at 4 K) was observed, suggesting a TMR enhancement by the coherent tunneling effect in the MgGa2O4 barrier. The MgGa2O4 layer had a spinel structure and it showed good lattice matching with the Fe layers owing to slight tetragonal lattice distortion of MgGa2O4. Barrier thickness dependence of the tunneling resistance and current-voltage characteristics revealed that the barrier height of","authors_text":"Hiroaki Sukegawa, Hiroaki Yoda, Junichi Ito, Kazuhiro Hono, Mohamed Belmoubarik, Naoharu Shimomura, P.-H. Cheng, Seiji Mitani, Tadakatsu Ohkubo, Tadaomi Daibou, Yushi Kato, Yuuzo Kamiguchi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-11T08:20:48Z","title":"MgGa2O4 spinel barrier for magnetic tunnel junctions: coherent tunneling and low barrier height"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03606","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:d5110fe17d1cc2d1dadc3b10d07de3535c20a87629faf925a17ee60f7be1bfe6","target":"record","created_at":"2026-05-18T00:47:08Z","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":"54169760726485db25a244bfc20fb34e926e4b3c91a4a6dd6cfeb4054b99857f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-11-11T08:20:48Z","title_canon_sha256":"3a60dc3dcc39fcf23b6f76df8c0e8d44685c36bf749ca06417f72266c1c7426b"},"schema_version":"1.0","source":{"id":"1611.03606","kind":"arxiv","version":1}},"canonical_sha256":"c2993eb51fe22a722c6e9880ce1e586317db53b84bf747622c07dbb48d9072bd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c2993eb51fe22a722c6e9880ce1e586317db53b84bf747622c07dbb48d9072bd","first_computed_at":"2026-05-18T00:47:08.812265Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:08.812265Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JR2/TFbMdxsFQXHRu81efG/sVKI/bAwkd168+dlmV/H6hP5dOd5sfejjwmsRNkUa708bwREDI8gmk41hPcldBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:08.812929Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.03606","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d5110fe17d1cc2d1dadc3b10d07de3535c20a87629faf925a17ee60f7be1bfe6","sha256:d503486d276f5aae9da4afa5e29e636a6028ac3a690c53f595d698de2ca5a1fa"],"state_sha256":"30374c3f1304e8dd5bbf58da91c33a7ee4da808970584827015a2a0f6b7073b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nojZL7vqYTIVDxPS+rcZ+lXagXoIcYrVDR++gcfeWpMtVkOrwYEjfs56MkBtnKzOFcuW4W/93lwSr/oVG+FYDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T00:43:58.623590Z","bundle_sha256":"e4dad1b8533437e318ba79da407e3aa573228665a95596d8365824b070e44678"}}