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This phase, however, has to compete with magnetic anisotropy and long-range ordered phases, the implementation of which depends on the ratio of interchain <jats:italic>J<\/jats:italic>\u2032 and intrachain <jats:italic>J<\/jats:italic> exchange interactions and both uniaxial <jats:italic>D<\/jats:italic> and rhombic <jats:italic>E<\/jats:italic> single-ion anisotropies. Strontium nickel selenite chloride, Sr<jats:sub>2<\/jats:sub>Ni(SeO<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub>Cl<jats:sub>2<\/jats:sub>, is a spin-1 chain system which passes through a correlations regime at <jats:italic>T<\/jats:italic><jats:sub>max<\/jats:sub>\u2009~\u200912\u00a0K to long-range order at <jats:italic>T<\/jats:italic><jats:sub>N<\/jats:sub>\u2009=\u20096\u00a0K. Under external magnetic field it experiences the sequence of spin-flop at <jats:italic>B<\/jats:italic><jats:sub>c1<\/jats:sub>\u2009=\u20099.0\u00a0T and spin-flip transitions <jats:italic>B<\/jats:italic><jats:sub>c2<\/jats:sub>\u2009=\u200923.7\u00a0T prior to full saturation at <jats:italic>B<\/jats:italic><jats:sub>sat<\/jats:sub>\u2009=\u200931.0\u00a0T. Density functional theory provides values of the main exchange interactions and uniaxial anisotropy which corroborate the experimental findings. The values of <jats:italic>J<\/jats:italic>\u2032\/<jats:italic>J<\/jats:italic>\u2009=\u20090.083 and <jats:italic>D<\/jats:italic>\/<jats:italic>J<\/jats:italic>\u2009=\u20090.357 place this compound into a hitherto unoccupied sector of the Sakai-Takahashi phase diagram.<\/jats:p>","DOI":"10.1038\/s41598-021-94390-3","type":"journal-article","created":{"date-parts":[[2021,7,22]],"date-time":"2021-07-22T10:04:09Z","timestamp":1626948249000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Quasi-1D XY antiferromagnet Sr2Ni(SeO3)2Cl2 at Sakai-Takahashi phase diagram"],"prefix":"10.1038","volume":"11","author":[{"given":"E. S.","family":"Kozlyakova","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A. V.","family":"Moskin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P. 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