{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:R4S7UL7R5GGTF23BAZ7WBEWJZJ","short_pith_number":"pith:R4S7UL7R","canonical_record":{"source":{"id":"1509.00132","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-01T04:10:08Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"af1e9f8dccd5414be943835acb89feb8758517e54ec314a7447914f331939793","abstract_canon_sha256":"6ef11beb1ee213cde6e0c7f171b89b2744d5423ec487b74c119bb885e3930699"},"schema_version":"1.0"},"canonical_sha256":"8f25fa2ff1e98d32eb61067f6092c9ca6faa87bf09a843d98458c452cb9fbb0f","source":{"kind":"arxiv","id":"1509.00132","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00132","created_at":"2026-05-18T01:23:29Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00132v2","created_at":"2026-05-18T01:23:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00132","created_at":"2026-05-18T01:23:29Z"},{"alias_kind":"pith_short_12","alias_value":"R4S7UL7R5GGT","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"R4S7UL7R5GGTF23B","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"R4S7UL7R","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:R4S7UL7R5GGTF23BAZ7WBEWJZJ","target":"record","payload":{"canonical_record":{"source":{"id":"1509.00132","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-01T04:10:08Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"af1e9f8dccd5414be943835acb89feb8758517e54ec314a7447914f331939793","abstract_canon_sha256":"6ef11beb1ee213cde6e0c7f171b89b2744d5423ec487b74c119bb885e3930699"},"schema_version":"1.0"},"canonical_sha256":"8f25fa2ff1e98d32eb61067f6092c9ca6faa87bf09a843d98458c452cb9fbb0f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:23:29.025936Z","signature_b64":"C8YN2EUNChHlygXvmNkgsvDm2v8QE2kx0TETTj7eP+iDL0tj5667W4JBQKTD4XpD3jDJxAbJqHg2swOI2ET/BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8f25fa2ff1e98d32eb61067f6092c9ca6faa87bf09a843d98458c452cb9fbb0f","last_reissued_at":"2026-05-18T01:23:29.025192Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:23:29.025192Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.00132","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:23:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pi4RiOsc41qr5y9uzMifo3AwFuGcFHZxqsIKZJic5siYtbAoo5WsAJ4dDUTxeN2BnjF6HauPmRAKkqtD3DH6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T08:41:28.541881Z"},"content_sha256":"61e5a83fc58617bcb8ecdbf40cdae59998f0f673c8e3384d68f578f1663ad16a","schema_version":"1.0","event_id":"sha256:61e5a83fc58617bcb8ecdbf40cdae59998f0f673c8e3384d68f578f1663ad16a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:R4S7UL7R5GGTF23BAZ7WBEWJZJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnon instability driven by heat current in magnetic bilayers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Eiji Saitoh, Hiroto Adachi, Sadamichi Maekawa, Yuichi Ohnuma","submitted_at":"2015-09-01T04:10:08Z","abstract_excerpt":"We theoretically demonstrate that, in a ferromagnet/paramagnet bilayer, a magnon instability accompanied by a gigahertz microwave emission can be driven simply by means of a temperature bias. Employing many-body theory for investigating the effects of a phonon heat current on the magnon lifetime, we show that the magnon instability occurs upon the suppression of the Umklapp scattering at low temperatures, leading to microwave emission. The present finding provides crucial information about the interplay of spin current and heat current."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00132","kind":"arxiv","version":2},"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":"2026-05-18T01:23:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qPTGfWs/cWypi8JP45Mfr6ytKmbA7avTeYE9iDMQRX1VfGJtCT+DimMuWIcibJv8QbDeN6ixIwh3sUYuVNK+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T08:41:28.542245Z"},"content_sha256":"966d665e0cc348647ffbced88d8cc225158109733cb8fb273cef1fbebd532d4b","schema_version":"1.0","event_id":"sha256:966d665e0cc348647ffbced88d8cc225158109733cb8fb273cef1fbebd532d4b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R4S7UL7R5GGTF23BAZ7WBEWJZJ/bundle.json","state_url":"https://pith.science/pith/R4S7UL7R5GGTF23BAZ7WBEWJZJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R4S7UL7R5GGTF23BAZ7WBEWJZJ/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":"2026-05-31T08:41:28Z","links":{"resolver":"https://pith.science/pith/R4S7UL7R5GGTF23BAZ7WBEWJZJ","bundle":"https://pith.science/pith/R4S7UL7R5GGTF23BAZ7WBEWJZJ/bundle.json","state":"https://pith.science/pith/R4S7UL7R5GGTF23BAZ7WBEWJZJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R4S7UL7R5GGTF23BAZ7WBEWJZJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:R4S7UL7R5GGTF23BAZ7WBEWJZJ","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":"6ef11beb1ee213cde6e0c7f171b89b2744d5423ec487b74c119bb885e3930699","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-01T04:10:08Z","title_canon_sha256":"af1e9f8dccd5414be943835acb89feb8758517e54ec314a7447914f331939793"},"schema_version":"1.0","source":{"id":"1509.00132","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00132","created_at":"2026-05-18T01:23:29Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00132v2","created_at":"2026-05-18T01:23:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00132","created_at":"2026-05-18T01:23:29Z"},{"alias_kind":"pith_short_12","alias_value":"R4S7UL7R5GGT","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"R4S7UL7R5GGTF23B","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"R4S7UL7R","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:966d665e0cc348647ffbced88d8cc225158109733cb8fb273cef1fbebd532d4b","target":"graph","created_at":"2026-05-18T01:23:29Z","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":"We theoretically demonstrate that, in a ferromagnet/paramagnet bilayer, a magnon instability accompanied by a gigahertz microwave emission can be driven simply by means of a temperature bias. Employing many-body theory for investigating the effects of a phonon heat current on the magnon lifetime, we show that the magnon instability occurs upon the suppression of the Umklapp scattering at low temperatures, leading to microwave emission. The present finding provides crucial information about the interplay of spin current and heat current.","authors_text":"Eiji Saitoh, Hiroto Adachi, Sadamichi Maekawa, Yuichi Ohnuma","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-01T04:10:08Z","title":"Magnon instability driven by heat current in magnetic bilayers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00132","kind":"arxiv","version":2},"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":"sha256:61e5a83fc58617bcb8ecdbf40cdae59998f0f673c8e3384d68f578f1663ad16a","target":"record","created_at":"2026-05-18T01:23:29Z","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":"6ef11beb1ee213cde6e0c7f171b89b2744d5423ec487b74c119bb885e3930699","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-01T04:10:08Z","title_canon_sha256":"af1e9f8dccd5414be943835acb89feb8758517e54ec314a7447914f331939793"},"schema_version":"1.0","source":{"id":"1509.00132","kind":"arxiv","version":2}},"canonical_sha256":"8f25fa2ff1e98d32eb61067f6092c9ca6faa87bf09a843d98458c452cb9fbb0f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f25fa2ff1e98d32eb61067f6092c9ca6faa87bf09a843d98458c452cb9fbb0f","first_computed_at":"2026-05-18T01:23:29.025192Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:29.025192Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C8YN2EUNChHlygXvmNkgsvDm2v8QE2kx0TETTj7eP+iDL0tj5667W4JBQKTD4XpD3jDJxAbJqHg2swOI2ET/BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:29.025936Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.00132","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:61e5a83fc58617bcb8ecdbf40cdae59998f0f673c8e3384d68f578f1663ad16a","sha256:966d665e0cc348647ffbced88d8cc225158109733cb8fb273cef1fbebd532d4b"],"state_sha256":"87692a108d3dd26d8adadbbd68b02f1bb41084291f2e2e7230e61748819f36a8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SF4Chp8KDRS7AjAT2G3etvnjpEA9MIQainRpBSxECRMif2HsscB3KFkSi6hHVlKahQfbrBuG8Q/w5lMOc6YyDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T08:41:28.544213Z","bundle_sha256":"295b8957e8407895aa9e0ff7e6a00f6a435495196d86652b62d9535df7b3b6bd"}}