{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:GHMVGV4HU67YHTUQEVYV364Y2K","short_pith_number":"pith:GHMVGV4H","canonical_record":{"source":{"id":"1510.07535","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-10-26T16:35:31Z","cross_cats_sorted":[],"title_canon_sha256":"a30cf63a42603d58641366584efc4bafcc410efa981bd4bb78cd67a8fc15cfd1","abstract_canon_sha256":"c702eb8d54e6f86673d35755357e848ae029ee2118844668d7b540b53bff4c47"},"schema_version":"1.0"},"canonical_sha256":"31d9535787a7bf83ce9025715dfb98d292d701ae30210859ea9db00f09694191","source":{"kind":"arxiv","id":"1510.07535","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07535","created_at":"2026-05-18T01:21:30Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07535v1","created_at":"2026-05-18T01:21:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07535","created_at":"2026-05-18T01:21:30Z"},{"alias_kind":"pith_short_12","alias_value":"GHMVGV4HU67Y","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GHMVGV4HU67YHTUQ","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GHMVGV4H","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:GHMVGV4HU67YHTUQEVYV364Y2K","target":"record","payload":{"canonical_record":{"source":{"id":"1510.07535","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-10-26T16:35:31Z","cross_cats_sorted":[],"title_canon_sha256":"a30cf63a42603d58641366584efc4bafcc410efa981bd4bb78cd67a8fc15cfd1","abstract_canon_sha256":"c702eb8d54e6f86673d35755357e848ae029ee2118844668d7b540b53bff4c47"},"schema_version":"1.0"},"canonical_sha256":"31d9535787a7bf83ce9025715dfb98d292d701ae30210859ea9db00f09694191","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:30.397900Z","signature_b64":"ranxra3lq4Q4pe3RdI0qvdWz3sELNJ/Pank5VZNyUc+fbCVcUCNcexe9QqjXUX9LYrSnLGN9DYofbJ3NY+KFAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"31d9535787a7bf83ce9025715dfb98d292d701ae30210859ea9db00f09694191","last_reissued_at":"2026-05-18T01:21:30.397327Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:30.397327Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.07535","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":"2026-05-18T01:21:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lzqd1NBKTif96YoKhZXt6lvXHDw73qI+Rzs6EhUzkiDBbyTkeXUMmxH6QbstAHcPZ8qkBhhm4waN/t9OfgIZDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T18:18:26.997231Z"},"content_sha256":"ce4d9b8d767cf6b0ec3109aba4ac397bb4323e0bd0334bae6d47e0e3b07f626f","schema_version":"1.0","event_id":"sha256:ce4d9b8d767cf6b0ec3109aba4ac397bb4323e0bd0334bae6d47e0e3b07f626f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:GHMVGV4HU67YHTUQEVYV364Y2K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spatial evolution of the ferromagnetic phase transition in an exchange graded film","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Berger, A. J. Grutter, B. J. Kirby, Casey W. Miller, D. D. Belyea, H. F. Belliveau, P. A. Kienzle, P. Riego","submitted_at":"2015-10-26T16:35:31Z","abstract_excerpt":"A combination of experiments and numerical modeling was used to study the spatial evolution of the ferromagnetic phase transition in a thin film engineered to have a smooth gradient in exchange strength. Mean-field simulations predict, and experiments confirm that a 100 nm Ni[x]Cu[1-x] alloy film with Ni concentration that varies by 9 % as a function of depth behaves predominantly as if comprised of a continuum of uncoupled ferromagnetic layers with continuously varying Curie temperatures. A mobile boundary separating ordered and disordered regions emerges as temperature is increased. We demon"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07535","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":"2026-05-18T01:21:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oZHjIswokHXFFYyvJqNnvF60cQEl6L0miT9zSa3gYNPd+HxdMw6osblpxSKKt2yaqAcw9Ex1tK3mOmnJcZpXDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T18:18:26.997579Z"},"content_sha256":"6fbe171922aa73381ffa8a9fda95e33dced79ce58d90c6f79e48fadf82471434","schema_version":"1.0","event_id":"sha256:6fbe171922aa73381ffa8a9fda95e33dced79ce58d90c6f79e48fadf82471434"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GHMVGV4HU67YHTUQEVYV364Y2K/bundle.json","state_url":"https://pith.science/pith/GHMVGV4HU67YHTUQEVYV364Y2K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GHMVGV4HU67YHTUQEVYV364Y2K/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":"2026-06-20T18:18:26Z","links":{"resolver":"https://pith.science/pith/GHMVGV4HU67YHTUQEVYV364Y2K","bundle":"https://pith.science/pith/GHMVGV4HU67YHTUQEVYV364Y2K/bundle.json","state":"https://pith.science/pith/GHMVGV4HU67YHTUQEVYV364Y2K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GHMVGV4HU67YHTUQEVYV364Y2K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:GHMVGV4HU67YHTUQEVYV364Y2K","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":"c702eb8d54e6f86673d35755357e848ae029ee2118844668d7b540b53bff4c47","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-10-26T16:35:31Z","title_canon_sha256":"a30cf63a42603d58641366584efc4bafcc410efa981bd4bb78cd67a8fc15cfd1"},"schema_version":"1.0","source":{"id":"1510.07535","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07535","created_at":"2026-05-18T01:21:30Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07535v1","created_at":"2026-05-18T01:21:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07535","created_at":"2026-05-18T01:21:30Z"},{"alias_kind":"pith_short_12","alias_value":"GHMVGV4HU67Y","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"GHMVGV4HU67YHTUQ","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"GHMVGV4H","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:6fbe171922aa73381ffa8a9fda95e33dced79ce58d90c6f79e48fadf82471434","target":"graph","created_at":"2026-05-18T01:21:30Z","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 combination of experiments and numerical modeling was used to study the spatial evolution of the ferromagnetic phase transition in a thin film engineered to have a smooth gradient in exchange strength. Mean-field simulations predict, and experiments confirm that a 100 nm Ni[x]Cu[1-x] alloy film with Ni concentration that varies by 9 % as a function of depth behaves predominantly as if comprised of a continuum of uncoupled ferromagnetic layers with continuously varying Curie temperatures. A mobile boundary separating ordered and disordered regions emerges as temperature is increased. We demon","authors_text":"A. Berger, A. J. Grutter, B. J. Kirby, Casey W. Miller, D. D. Belyea, H. F. Belliveau, P. A. Kienzle, P. Riego","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-10-26T16:35:31Z","title":"Spatial evolution of the ferromagnetic phase transition in an exchange graded film"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07535","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:ce4d9b8d767cf6b0ec3109aba4ac397bb4323e0bd0334bae6d47e0e3b07f626f","target":"record","created_at":"2026-05-18T01:21:30Z","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":"c702eb8d54e6f86673d35755357e848ae029ee2118844668d7b540b53bff4c47","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-10-26T16:35:31Z","title_canon_sha256":"a30cf63a42603d58641366584efc4bafcc410efa981bd4bb78cd67a8fc15cfd1"},"schema_version":"1.0","source":{"id":"1510.07535","kind":"arxiv","version":1}},"canonical_sha256":"31d9535787a7bf83ce9025715dfb98d292d701ae30210859ea9db00f09694191","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31d9535787a7bf83ce9025715dfb98d292d701ae30210859ea9db00f09694191","first_computed_at":"2026-05-18T01:21:30.397327Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:21:30.397327Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ranxra3lq4Q4pe3RdI0qvdWz3sELNJ/Pank5VZNyUc+fbCVcUCNcexe9QqjXUX9LYrSnLGN9DYofbJ3NY+KFAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:21:30.397900Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.07535","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce4d9b8d767cf6b0ec3109aba4ac397bb4323e0bd0334bae6d47e0e3b07f626f","sha256:6fbe171922aa73381ffa8a9fda95e33dced79ce58d90c6f79e48fadf82471434"],"state_sha256":"c90926adb65241d581d996108b240c9a4c74709351493c33d48ea8dddada356e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qOH1vwKEatgA7dn5UHN5ok+igiI/uEl2OL+q3kNq1eIyfkv9UdnEIUkYylcA+FbIwy3xoX+mW6ua6dKT9/ZRDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T18:18:26.999438Z","bundle_sha256":"cc4579c91b4d213890869ab90b78e62cb955a0b0feacddcbddd887f2c986893c"}}