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This quantum magnet features a singlet ground state and comprises two types of alternating spin-$\\frac12$ chains that manifest themselves by the double maxima in the susceptibility and magnetic specific heat, and by the two-step magnetization process with an intermediate $\\frac12$-plateau. From thermodynamic data and band-structure calculations, we estimate the leading couplings of $J_1\\simeq 20$ K and $J_2\\simeq 60$ K a"},"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":"2002.12907","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-02-28T18:23:05Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"25342f99b415f15e18009f93e1a57502349c0b1e4cb21059da7a3c5f12aad3ae","abstract_canon_sha256":"4861ef243baa010609f0f3ee02804d3b62b2cee606c7d52039b5b31875b039dd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:07:13.105022Z","signature_b64":"Pf5ppINDn1bNKrth2hFtswGFpuyqy4BruhoXNADyGxhg8h/dfidCi5rL66OVu4isgBNoafH5HQ0TVhrzRnSJDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"acec70bad334173033e10b7812e04410d757c71920e4e176b923df96f4ce80b6","last_reissued_at":"2026-07-05T01:07:13.104599Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:07:13.104599Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Two types of alternating spin-$\\frac12$ chains and their field-induced transitions in $\\varepsilon$-LiVOPO$_4$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.str-el","authors_text":"A. 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