{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2QTP2YTRJTN54PCYQPFNMQRJKY","short_pith_number":"pith:2QTP2YTR","canonical_record":{"source":{"id":"1904.13121","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-04-30T09:35:05Z","cross_cats_sorted":[],"title_canon_sha256":"d0f16b15614e8a1d0bedf068195015644cb3feae2ad8cae0125f7eab72212ee3","abstract_canon_sha256":"d601e064a0eb17a74f48461b97952177c1afa10b8f348d8f40af0ad9a2c96be1"},"schema_version":"1.0"},"canonical_sha256":"d426fd62714cdbde3c5883cad642295629a85d02dff4a5ed30a7a8a5aa14cb0e","source":{"kind":"arxiv","id":"1904.13121","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.13121","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"arxiv_version","alias_value":"1904.13121v2","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.13121","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"pith_short_12","alias_value":"2QTP2YTRJTN5","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"pith_short_16","alias_value":"2QTP2YTRJTN54PCY","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"pith_short_8","alias_value":"2QTP2YTR","created_at":"2026-07-04T23:52:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2QTP2YTRJTN54PCYQPFNMQRJKY","target":"record","payload":{"canonical_record":{"source":{"id":"1904.13121","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-04-30T09:35:05Z","cross_cats_sorted":[],"title_canon_sha256":"d0f16b15614e8a1d0bedf068195015644cb3feae2ad8cae0125f7eab72212ee3","abstract_canon_sha256":"d601e064a0eb17a74f48461b97952177c1afa10b8f348d8f40af0ad9a2c96be1"},"schema_version":"1.0"},"canonical_sha256":"d426fd62714cdbde3c5883cad642295629a85d02dff4a5ed30a7a8a5aa14cb0e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:52:35.832129Z","signature_b64":"mTPZzk4oNzBc9nR6r22OxYoCpez3gl4AeoD0OqDm3FMXxCjjpMKXTJWOdSzrDRDO43Zwu91P7Jrdsosqny8PDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d426fd62714cdbde3c5883cad642295629a85d02dff4a5ed30a7a8a5aa14cb0e","last_reissued_at":"2026-07-04T23:52:35.831723Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:52:35.831723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.13121","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":"2026-07-04T23:52:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gdrmo1gBz9FBZ6hXpXQkBQSf72k0CV6mhoe5/X72nveSbtx7dDzG1CzOdikgHA6m8xlkOegSjANTvU7ZB7UtCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T01:35:29.504746Z"},"content_sha256":"b3ceff41632d4f511fbb26dc220b22ffbcb439c72f73c9d7bdd8eb2773a298b3","schema_version":"1.0","event_id":"sha256:b3ceff41632d4f511fbb26dc220b22ffbcb439c72f73c9d7bdd8eb2773a298b3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2QTP2YTRJTN54PCYQPFNMQRJKY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quadratic magnetooptic Kerr effect spectroscopy of Fe epitaxial films on MgO(001) substrates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Jannis Thien, Jaroslav Hamrle, Joachim Wollschl\\\"ager, Luk\\'a\\v{s} Beran, Martin Veis, Olga Kuschel, Ond\\v{r}ej Stejskal, Petr Cejpek, Robin Silber, Roman Anto\\v{s}, Timo Kuschel, Tristan Matalla-Wagner","submitted_at":"2019-04-30T09:35:05Z","abstract_excerpt":"The magnetooptic Kerr effect (MOKE) is a well known and handy tool to characterize ferro-, ferri- and antiferromagnetic materials. Many of the MOKE techniques employ effects solely linear in magnetization $\\bm{M}$. Nevertheless, a higher-order term being proportional to $\\bm{M}^2$ and called quadratic MOKE (QMOKE) can additionally contribute to the experimental data. Here, we present detailed QMOKE spectroscopy measurements in the range of 0.8 -- 5.5\\,eV based on a modified 8-directional method applied on ferromagnetic bcc Fe thin films grown on MgO substrates. From the measured QMOKE spectra,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.13121","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1904.13121/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":"2026-07-04T23:52:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"crgAb2u0d7JlUjYDVmnUe7g6U30pcKTUI1jAnltdV14WUqvlBP4TeBDUIMGuo945Ri0Yfx30R4nCfA5dm8puBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T01:35:29.505273Z"},"content_sha256":"bfe29f6dd1f18e4fa3f409eea4392372d9ee1f1e087c65637452731d4dc434d8","schema_version":"1.0","event_id":"sha256:bfe29f6dd1f18e4fa3f409eea4392372d9ee1f1e087c65637452731d4dc434d8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2QTP2YTRJTN54PCYQPFNMQRJKY/bundle.json","state_url":"https://pith.science/pith/2QTP2YTRJTN54PCYQPFNMQRJKY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2QTP2YTRJTN54PCYQPFNMQRJKY/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":"2026-08-20T01:35:29Z","links":{"resolver":"https://pith.science/pith/2QTP2YTRJTN54PCYQPFNMQRJKY","bundle":"https://pith.science/pith/2QTP2YTRJTN54PCYQPFNMQRJKY/bundle.json","state":"https://pith.science/pith/2QTP2YTRJTN54PCYQPFNMQRJKY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2QTP2YTRJTN54PCYQPFNMQRJKY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2QTP2YTRJTN54PCYQPFNMQRJKY","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":"d601e064a0eb17a74f48461b97952177c1afa10b8f348d8f40af0ad9a2c96be1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-04-30T09:35:05Z","title_canon_sha256":"d0f16b15614e8a1d0bedf068195015644cb3feae2ad8cae0125f7eab72212ee3"},"schema_version":"1.0","source":{"id":"1904.13121","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.13121","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"arxiv_version","alias_value":"1904.13121v2","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.13121","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"pith_short_12","alias_value":"2QTP2YTRJTN5","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"pith_short_16","alias_value":"2QTP2YTRJTN54PCY","created_at":"2026-07-04T23:52:35Z"},{"alias_kind":"pith_short_8","alias_value":"2QTP2YTR","created_at":"2026-07-04T23:52:35Z"}],"graph_snapshots":[{"event_id":"sha256:bfe29f6dd1f18e4fa3f409eea4392372d9ee1f1e087c65637452731d4dc434d8","target":"graph","created_at":"2026-07-04T23:52:35Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1904.13121/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The magnetooptic Kerr effect (MOKE) is a well known and handy tool to characterize ferro-, ferri- and antiferromagnetic materials. Many of the MOKE techniques employ effects solely linear in magnetization $\\bm{M}$. Nevertheless, a higher-order term being proportional to $\\bm{M}^2$ and called quadratic MOKE (QMOKE) can additionally contribute to the experimental data. Here, we present detailed QMOKE spectroscopy measurements in the range of 0.8 -- 5.5\\,eV based on a modified 8-directional method applied on ferromagnetic bcc Fe thin films grown on MgO substrates. From the measured QMOKE spectra,","authors_text":"Jannis Thien, Jaroslav Hamrle, Joachim Wollschl\\\"ager, Luk\\'a\\v{s} Beran, Martin Veis, Olga Kuschel, Ond\\v{r}ej Stejskal, Petr Cejpek, Robin Silber, Roman Anto\\v{s}, Timo Kuschel, Tristan Matalla-Wagner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-04-30T09:35:05Z","title":"Quadratic magnetooptic Kerr effect spectroscopy of Fe epitaxial films on MgO(001) substrates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.13121","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:b3ceff41632d4f511fbb26dc220b22ffbcb439c72f73c9d7bdd8eb2773a298b3","target":"record","created_at":"2026-07-04T23:52:35Z","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":"d601e064a0eb17a74f48461b97952177c1afa10b8f348d8f40af0ad9a2c96be1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-04-30T09:35:05Z","title_canon_sha256":"d0f16b15614e8a1d0bedf068195015644cb3feae2ad8cae0125f7eab72212ee3"},"schema_version":"1.0","source":{"id":"1904.13121","kind":"arxiv","version":2}},"canonical_sha256":"d426fd62714cdbde3c5883cad642295629a85d02dff4a5ed30a7a8a5aa14cb0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d426fd62714cdbde3c5883cad642295629a85d02dff4a5ed30a7a8a5aa14cb0e","first_computed_at":"2026-07-04T23:52:35.831723Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:52:35.831723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mTPZzk4oNzBc9nR6r22OxYoCpez3gl4AeoD0OqDm3FMXxCjjpMKXTJWOdSzrDRDO43Zwu91P7Jrdsosqny8PDA==","signature_status":"signed_v1","signed_at":"2026-07-04T23:52:35.832129Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.13121","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3ceff41632d4f511fbb26dc220b22ffbcb439c72f73c9d7bdd8eb2773a298b3","sha256:bfe29f6dd1f18e4fa3f409eea4392372d9ee1f1e087c65637452731d4dc434d8"],"state_sha256":"5dfab3524dd0bc51a0927f8c4e2eb994890b6224348886b21e49c1ce1dc77cdb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R4WR4LAdJVF8aJnYrh/RmVAong/6XEIyAB5995LIuLtmcbhteGXKYItv4zDIau0ZCJNDUWnROjyS28zp+R7zAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T01:35:29.510679Z","bundle_sha256":"e7e2f9bb5989be709cd7259e432f1f6b1c02133a2622648083c4fb654f5a698b"}}