{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:6I3UU5LLZC7ZWGZKEO2DT6YDZT","short_pith_number":"pith:6I3UU5LL","canonical_record":{"source":{"id":"1804.02103","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-04-06T01:30:33Z","cross_cats_sorted":[],"title_canon_sha256":"58212ecd1545067b246ff889a6fe2217f3ca140c08acea641eaf95f0be66a92a","abstract_canon_sha256":"df2b043b8053bd79bbe17674d8e2c78bd6978db2ee228f1cdbec24a0bfc6055d"},"schema_version":"1.0"},"canonical_sha256":"f2374a756bc8bf9b1b2a23b439fb03ccc9f71bf253de698a9aa71a0837efd747","source":{"kind":"arxiv","id":"1804.02103","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.02103","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"arxiv_version","alias_value":"1804.02103v1","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.02103","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"pith_short_12","alias_value":"6I3UU5LLZC7Z","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6I3UU5LLZC7ZWGZK","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6I3UU5LL","created_at":"2026-05-18T12:32:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:6I3UU5LLZC7ZWGZKEO2DT6YDZT","target":"record","payload":{"canonical_record":{"source":{"id":"1804.02103","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-04-06T01:30:33Z","cross_cats_sorted":[],"title_canon_sha256":"58212ecd1545067b246ff889a6fe2217f3ca140c08acea641eaf95f0be66a92a","abstract_canon_sha256":"df2b043b8053bd79bbe17674d8e2c78bd6978db2ee228f1cdbec24a0bfc6055d"},"schema_version":"1.0"},"canonical_sha256":"f2374a756bc8bf9b1b2a23b439fb03ccc9f71bf253de698a9aa71a0837efd747","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:35.270847Z","signature_b64":"Bp0YCxgqHZXW0R9ajyGxy4hxcLGyKdsGtRDzHbbMQwThkvC3HZc0LAnaLUsrumwQXak9g/sPDaxlSZXqU3L0Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2374a756bc8bf9b1b2a23b439fb03ccc9f71bf253de698a9aa71a0837efd747","last_reissued_at":"2026-05-18T00:02:35.270271Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:35.270271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.02103","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":"2026-05-18T00:02:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C+DwPonYlJaYPbA1pzA+XEcZW6pg2/zYJGIdjYA9U0u69Nj0i8dfi/7dZfuiydu6JdwC5m6Sc+pD/wdUJp4jDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T10:31:38.926088Z"},"content_sha256":"1ca36f12b57613e6dbe5212373245ba9511e2f909b8ad56a1addffcbb7009843","schema_version":"1.0","event_id":"sha256:1ca36f12b57613e6dbe5212373245ba9511e2f909b8ad56a1addffcbb7009843"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:6I3UU5LLZC7ZWGZKEO2DT6YDZT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spin absorption by in situ deposited nanoscale magnets on graphene spin valves","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Gordon Stecklein, Paul A. Crowell, Roland K. Kawakami, Steven J. Koester, Walid Amamou","submitted_at":"2018-04-06T01:30:33Z","abstract_excerpt":"An in situ measurement of spin transport in a graphene nonlocal spin valve is used to quantify the spin current absorbed by a small (250 nm $\\times$ 750 nm) metallic island. The experiment allows for successive depositions of either Fe or Cu without breaking vacuum, so that the thickness of the island is the only parameter that is varied. Furthermore, by measuring the effect of the island using separate contacts for injection and detection, we isolate the effect of spin absorption from any change in the spin injection and detection mechanisms. As inferred from the thickness dependence, the eff"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.02103","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":"2026-05-18T00:02:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ATuQ28H3AqungXdtPQe349G/bJ5ZLk9QFtOBu+SHLl5GybWcrlcb6rajUQ3SdC8zmlX0pUCLz1V3av83XhN9Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T10:31:38.926453Z"},"content_sha256":"2a71cc131cbc8fe2c320b7c0f74af1fecb61df6f4f913207eda89d89613cedc6","schema_version":"1.0","event_id":"sha256:2a71cc131cbc8fe2c320b7c0f74af1fecb61df6f4f913207eda89d89613cedc6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6I3UU5LLZC7ZWGZKEO2DT6YDZT/bundle.json","state_url":"https://pith.science/pith/6I3UU5LLZC7ZWGZKEO2DT6YDZT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6I3UU5LLZC7ZWGZKEO2DT6YDZT/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":"2026-06-04T10:31:38Z","links":{"resolver":"https://pith.science/pith/6I3UU5LLZC7ZWGZKEO2DT6YDZT","bundle":"https://pith.science/pith/6I3UU5LLZC7ZWGZKEO2DT6YDZT/bundle.json","state":"https://pith.science/pith/6I3UU5LLZC7ZWGZKEO2DT6YDZT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6I3UU5LLZC7ZWGZKEO2DT6YDZT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:6I3UU5LLZC7ZWGZKEO2DT6YDZT","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":"df2b043b8053bd79bbe17674d8e2c78bd6978db2ee228f1cdbec24a0bfc6055d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-04-06T01:30:33Z","title_canon_sha256":"58212ecd1545067b246ff889a6fe2217f3ca140c08acea641eaf95f0be66a92a"},"schema_version":"1.0","source":{"id":"1804.02103","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.02103","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"arxiv_version","alias_value":"1804.02103v1","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.02103","created_at":"2026-05-18T00:02:35Z"},{"alias_kind":"pith_short_12","alias_value":"6I3UU5LLZC7Z","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"6I3UU5LLZC7ZWGZK","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"6I3UU5LL","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:2a71cc131cbc8fe2c320b7c0f74af1fecb61df6f4f913207eda89d89613cedc6","target":"graph","created_at":"2026-05-18T00:02:35Z","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":"An in situ measurement of spin transport in a graphene nonlocal spin valve is used to quantify the spin current absorbed by a small (250 nm $\\times$ 750 nm) metallic island. The experiment allows for successive depositions of either Fe or Cu without breaking vacuum, so that the thickness of the island is the only parameter that is varied. Furthermore, by measuring the effect of the island using separate contacts for injection and detection, we isolate the effect of spin absorption from any change in the spin injection and detection mechanisms. As inferred from the thickness dependence, the eff","authors_text":"Gordon Stecklein, Paul A. Crowell, Roland K. Kawakami, Steven J. Koester, Walid Amamou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-04-06T01:30:33Z","title":"Spin absorption by in situ deposited nanoscale magnets on graphene spin valves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.02103","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":"sha256:1ca36f12b57613e6dbe5212373245ba9511e2f909b8ad56a1addffcbb7009843","target":"record","created_at":"2026-05-18T00:02:35Z","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":"df2b043b8053bd79bbe17674d8e2c78bd6978db2ee228f1cdbec24a0bfc6055d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-04-06T01:30:33Z","title_canon_sha256":"58212ecd1545067b246ff889a6fe2217f3ca140c08acea641eaf95f0be66a92a"},"schema_version":"1.0","source":{"id":"1804.02103","kind":"arxiv","version":1}},"canonical_sha256":"f2374a756bc8bf9b1b2a23b439fb03ccc9f71bf253de698a9aa71a0837efd747","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2374a756bc8bf9b1b2a23b439fb03ccc9f71bf253de698a9aa71a0837efd747","first_computed_at":"2026-05-18T00:02:35.270271Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:35.270271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Bp0YCxgqHZXW0R9ajyGxy4hxcLGyKdsGtRDzHbbMQwThkvC3HZc0LAnaLUsrumwQXak9g/sPDaxlSZXqU3L0Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:35.270847Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.02103","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1ca36f12b57613e6dbe5212373245ba9511e2f909b8ad56a1addffcbb7009843","sha256:2a71cc131cbc8fe2c320b7c0f74af1fecb61df6f4f913207eda89d89613cedc6"],"state_sha256":"319a789273e935e820251080bd95b1b4b47580a7eb1e7b078b73231dd6b915d3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D+as9/0jJCNmeCxTcabqfe+ZRehZ9sWT+XYrqKHh7O2vlXNXU+/RR0089t/HbkaEAnvGPii/y7ZP2s1oXlohDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T10:31:38.928374Z","bundle_sha256":"9fb9032899e73d62a0c673eda96fc704d7ea046f6f6a6826747c42f989439018"}}