{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:UGAJO2QZGATTR7C5HG3KTWOFRV","short_pith_number":"pith:UGAJO2QZ","schema_version":"1.0","canonical_sha256":"a180976a19302738fc5d39b6a9d9c58d7f012fb7591a4f8122872a12bf3f3097","source":{"kind":"arxiv","id":"1806.10970","version":1},"attestation_state":"computed","paper":{"title":"$\\mu$SR study of spin freezing and persistent spin dynamics in NaCaNi$_2$F$_7$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A.M. Hallas, B. A. Frandsen, G.M. Luke, J. W. Krizan, L. Liu, M.N. Wilson, O. Rubel, R. J. Cava, S. R. Dunsiger, Y. Cai, Y. J. Uemura","submitted_at":"2018-06-28T13:49:08Z","abstract_excerpt":"A new pyrochlore compound, NaCaNi$_2$F$_7$, was recently synthesized and has a single magnetic site with spin-1 Ni$^{2+}$. We present zero field (ZF) and longitudinal field (LF) muon spin rotation ($\\mu$SR) measurements on this pyrochlore. Density functional theory (DFT) calculations show that the most likely muon site is located between two fluorine ions, but off-centre. A characteristic F-$\\mu$-F muon spin polarization function is observed at high temperatures where Ni spin fluctuations are sufficiently rapid. The Ni$^{2+}$ spins undergo spin freezing into a disordered ground state below 4~K"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1806.10970","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-06-28T13:49:08Z","cross_cats_sorted":[],"title_canon_sha256":"b7e659e674ea8a91fcda57a79e70bd27e8dacf6618f74e3d6d9cb6880b96a3e6","abstract_canon_sha256":"54283be06bab468bdfeee281b9b7aff3df238cf75cdfbd282c2e351ffef95aa7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:55.764455Z","signature_b64":"5g0NzcDAa37LiuFyZ1uGkv1G46PfR//m0UM4c2HW5dQ76vBu5Ps9Ca8AKaEEvbqAgMYytgHG0eDCpNmVrJnMCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a180976a19302738fc5d39b6a9d9c58d7f012fb7591a4f8122872a12bf3f3097","last_reissued_at":"2026-05-18T00:04:55.763828Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:55.763828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"$\\mu$SR study of spin freezing and persistent spin dynamics in NaCaNi$_2$F$_7$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A.M. Hallas, B. A. Frandsen, G.M. Luke, J. W. Krizan, L. Liu, M.N. Wilson, O. Rubel, R. J. Cava, S. R. Dunsiger, Y. Cai, Y. J. Uemura","submitted_at":"2018-06-28T13:49:08Z","abstract_excerpt":"A new pyrochlore compound, NaCaNi$_2$F$_7$, was recently synthesized and has a single magnetic site with spin-1 Ni$^{2+}$. We present zero field (ZF) and longitudinal field (LF) muon spin rotation ($\\mu$SR) measurements on this pyrochlore. Density functional theory (DFT) calculations show that the most likely muon site is located between two fluorine ions, but off-centre. A characteristic F-$\\mu$-F muon spin polarization function is observed at high temperatures where Ni spin fluctuations are sufficiently rapid. The Ni$^{2+}$ spins undergo spin freezing into a disordered ground state below 4~K"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.10970","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1806.10970","created_at":"2026-05-18T00:04:55.763921+00:00"},{"alias_kind":"arxiv_version","alias_value":"1806.10970v1","created_at":"2026-05-18T00:04:55.763921+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.10970","created_at":"2026-05-18T00:04:55.763921+00:00"},{"alias_kind":"pith_short_12","alias_value":"UGAJO2QZGATT","created_at":"2026-05-18T12:32:56.356000+00:00"},{"alias_kind":"pith_short_16","alias_value":"UGAJO2QZGATTR7C5","created_at":"2026-05-18T12:32:56.356000+00:00"},{"alias_kind":"pith_short_8","alias_value":"UGAJO2QZ","created_at":"2026-05-18T12:32:56.356000+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV","json":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV.json","graph_json":"https://pith.science/api/pith-number/UGAJO2QZGATTR7C5HG3KTWOFRV/graph.json","events_json":"https://pith.science/api/pith-number/UGAJO2QZGATTR7C5HG3KTWOFRV/events.json","paper":"https://pith.science/paper/UGAJO2QZ"},"agent_actions":{"view_html":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV","download_json":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV.json","view_paper":"https://pith.science/paper/UGAJO2QZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1806.10970&json=true","fetch_graph":"https://pith.science/api/pith-number/UGAJO2QZGATTR7C5HG3KTWOFRV/graph.json","fetch_events":"https://pith.science/api/pith-number/UGAJO2QZGATTR7C5HG3KTWOFRV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV/action/storage_attestation","attest_author":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV/action/author_attestation","sign_citation":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV/action/citation_signature","submit_replication":"https://pith.science/pith/UGAJO2QZGATTR7C5HG3KTWOFRV/action/replication_record"}},"created_at":"2026-05-18T00:04:55.763921+00:00","updated_at":"2026-05-18T00:04:55.763921+00:00"}