{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:JYLAKSCBJIU4A7AH4ODDT4UHER","short_pith_number":"pith:JYLAKSCB","canonical_record":{"source":{"id":"2606.31563","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-30T12:19:43Z","cross_cats_sorted":[],"title_canon_sha256":"91122bb9e84665fa4cf29f144d344499c9234778028e211fc25aa634d00fe26a","abstract_canon_sha256":"d1957e0ac2eb7bc88cef1fdc9fd02aa61b8cbf500ace1ee10e4a04648c4ceb40"},"schema_version":"1.0"},"canonical_sha256":"4e160548414a29c07c07e38639f287247a2e413dbf17e8d10e333b5b61ccb0d0","source":{"kind":"arxiv","id":"2606.31563","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.31563","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"arxiv_version","alias_value":"2606.31563v1","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.31563","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"pith_short_12","alias_value":"JYLAKSCBJIU4","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"pith_short_16","alias_value":"JYLAKSCBJIU4A7AH","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"pith_short_8","alias_value":"JYLAKSCB","created_at":"2026-07-01T01:18:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:JYLAKSCBJIU4A7AH4ODDT4UHER","target":"record","payload":{"canonical_record":{"source":{"id":"2606.31563","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-30T12:19:43Z","cross_cats_sorted":[],"title_canon_sha256":"91122bb9e84665fa4cf29f144d344499c9234778028e211fc25aa634d00fe26a","abstract_canon_sha256":"d1957e0ac2eb7bc88cef1fdc9fd02aa61b8cbf500ace1ee10e4a04648c4ceb40"},"schema_version":"1.0"},"canonical_sha256":"4e160548414a29c07c07e38639f287247a2e413dbf17e8d10e333b5b61ccb0d0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-01T01:18:07.211083Z","signature_b64":"eOeGjpQTPES2Dh68PQhIu9esC5GAwC7n+/wd5hfiZXYIdmubsJWo8LAg8tIv5W1z1ustPIl6SjO+JTF+OGp1Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4e160548414a29c07c07e38639f287247a2e413dbf17e8d10e333b5b61ccb0d0","last_reissued_at":"2026-07-01T01:18:07.210649Z","signature_status":"signed_v1","first_computed_at":"2026-07-01T01:18:07.210649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.31563","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":"2026-07-01T01:18:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"21dmv041MOK4D+1C0invr/Qh2+XdjCFCgyHj3Oehy3mmNYk8aE5q3p6J5h6d5g9KIh42RpWuOTXKySeUR6WFAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T14:24:42.199546Z"},"content_sha256":"883184c2824cdaa4e58db700a59f7f078ab7a06847b56257db504c3829fe4849","schema_version":"1.0","event_id":"sha256:883184c2824cdaa4e58db700a59f7f078ab7a06847b56257db504c3829fe4849"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:JYLAKSCBJIU4A7AH4ODDT4UHER","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin-related transport in a polycrystalline NiCo2O4 film: Drastic current-induced change in resistivity-temperature characteristics via spin injection","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Masaaki Tanaka, Ryosho Nakane, Shiho Sugiyama","submitted_at":"2026-06-30T12:19:43Z","abstract_excerpt":"We have studied spin-related transport in a polycrystalline NiCo2O4 (NCO) film on a MgAl2O4/Si(001) substrate, motivated by potential applications of the theoretical half-metallicity of NCO to Si-based high-performance spin-transport devices. Our approach is to systematically measure and analyze the temperature dependence of the film's resistivity ($\\rho-T$) with various in-plane currents (100 nA$-$1 mA) and temperatures (4$-$290 K). With increasing current, the $\\rho-T$ curve changes drastically from semiconducting ($d\\rho/dT<0$) to non-monotonic and eventually toward metallic ($d\\rho/dT>0$)."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.31563","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/2606.31563/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":"2026-07-01T01:18:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OmesPkqcipVien5++4noqq/oLRLG+Pi17MWZqdHLg61GUc2Bgz7E0pPRXKte5IAulZW5ngA3yvHMr0BOo3DtCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T14:24:42.200375Z"},"content_sha256":"d83cd91c6283942be221a95f6bf2830c65ee37bc1996af2053b0e3fef3f96858","schema_version":"1.0","event_id":"sha256:d83cd91c6283942be221a95f6bf2830c65ee37bc1996af2053b0e3fef3f96858"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JYLAKSCBJIU4A7AH4ODDT4UHER/bundle.json","state_url":"https://pith.science/pith/JYLAKSCBJIU4A7AH4ODDT4UHER/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JYLAKSCBJIU4A7AH4ODDT4UHER/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":"2026-08-18T14:24:42Z","links":{"resolver":"https://pith.science/pith/JYLAKSCBJIU4A7AH4ODDT4UHER","bundle":"https://pith.science/pith/JYLAKSCBJIU4A7AH4ODDT4UHER/bundle.json","state":"https://pith.science/pith/JYLAKSCBJIU4A7AH4ODDT4UHER/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JYLAKSCBJIU4A7AH4ODDT4UHER/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:JYLAKSCBJIU4A7AH4ODDT4UHER","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":"d1957e0ac2eb7bc88cef1fdc9fd02aa61b8cbf500ace1ee10e4a04648c4ceb40","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-30T12:19:43Z","title_canon_sha256":"91122bb9e84665fa4cf29f144d344499c9234778028e211fc25aa634d00fe26a"},"schema_version":"1.0","source":{"id":"2606.31563","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.31563","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"arxiv_version","alias_value":"2606.31563v1","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.31563","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"pith_short_12","alias_value":"JYLAKSCBJIU4","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"pith_short_16","alias_value":"JYLAKSCBJIU4A7AH","created_at":"2026-07-01T01:18:07Z"},{"alias_kind":"pith_short_8","alias_value":"JYLAKSCB","created_at":"2026-07-01T01:18:07Z"}],"graph_snapshots":[{"event_id":"sha256:d83cd91c6283942be221a95f6bf2830c65ee37bc1996af2053b0e3fef3f96858","target":"graph","created_at":"2026-07-01T01:18:07Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.31563/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have studied spin-related transport in a polycrystalline NiCo2O4 (NCO) film on a MgAl2O4/Si(001) substrate, motivated by potential applications of the theoretical half-metallicity of NCO to Si-based high-performance spin-transport devices. Our approach is to systematically measure and analyze the temperature dependence of the film's resistivity ($\\rho-T$) with various in-plane currents (100 nA$-$1 mA) and temperatures (4$-$290 K). With increasing current, the $\\rho-T$ curve changes drastically from semiconducting ($d\\rho/dT<0$) to non-monotonic and eventually toward metallic ($d\\rho/dT>0$).","authors_text":"Masaaki Tanaka, Ryosho Nakane, Shiho Sugiyama","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-30T12:19:43Z","title":"Spin-related transport in a polycrystalline NiCo2O4 film: Drastic current-induced change in resistivity-temperature characteristics via spin injection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.31563","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":"sha256:883184c2824cdaa4e58db700a59f7f078ab7a06847b56257db504c3829fe4849","target":"record","created_at":"2026-07-01T01:18:07Z","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":"d1957e0ac2eb7bc88cef1fdc9fd02aa61b8cbf500ace1ee10e4a04648c4ceb40","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-30T12:19:43Z","title_canon_sha256":"91122bb9e84665fa4cf29f144d344499c9234778028e211fc25aa634d00fe26a"},"schema_version":"1.0","source":{"id":"2606.31563","kind":"arxiv","version":1}},"canonical_sha256":"4e160548414a29c07c07e38639f287247a2e413dbf17e8d10e333b5b61ccb0d0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4e160548414a29c07c07e38639f287247a2e413dbf17e8d10e333b5b61ccb0d0","first_computed_at":"2026-07-01T01:18:07.210649Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-01T01:18:07.210649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eOeGjpQTPES2Dh68PQhIu9esC5GAwC7n+/wd5hfiZXYIdmubsJWo8LAg8tIv5W1z1ustPIl6SjO+JTF+OGp1Bw==","signature_status":"signed_v1","signed_at":"2026-07-01T01:18:07.211083Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.31563","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:883184c2824cdaa4e58db700a59f7f078ab7a06847b56257db504c3829fe4849","sha256:d83cd91c6283942be221a95f6bf2830c65ee37bc1996af2053b0e3fef3f96858"],"state_sha256":"78c16dbe87f661b871b9412d0cc23988fa0109be54b95239787dd8b9959ffac4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TJhL7LwqjVZqEN9zHpDkaieXmpxvaL7UOoZeKyxbxps7oZWm5EhY9HtvqL45k0n/y+/A6CjkE4VDEQaSHClDAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T14:24:42.208203Z","bundle_sha256":"b86fa899c98d432b6504f5957daede75f99ab8a02cd2f054b99fc6d070295f56"}}