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Phys.: Condens. Matter"],"published-print":{"date-parts":[[2026,2,20]]},"abstract":"Abstract<\/jats:title>\n \n Here, we present a systematic study of de Haas-van Alphen oscillations (dHvAs), topological phase, and anomalous Hall effect (AHE) of Ni\n 0.5<\/jats:sub>\n Co\n 0.5<\/jats:sub>\n Se single crystal. Low-temperature longitudinal resistivity\n \u03c1<\/jats:italic>\n \n xx<\/jats:italic>\n <\/jats:sub>\n (\n T<\/jats:italic>\n ) under different magnetic fields exhibits an upturn, indicative of a semimetallic phase. Fitting of the zero-field\n \u03c1<\/jats:italic>\n \n xx<\/jats:italic>\n <\/jats:sub>\n (\n T<\/jats:italic>\n ) data with the Bloch\u2013Gruneisen\u2013Mott model including Kondo resistivity term reveals multiple scattering mechanisms, which is substantiated by the deviation from Kohler\u2019s rule of the magnetoresistance curves. At\n T<\/jats:italic>\n = 2\u2009K and low magnetic fields, the observed cusp-like features indicate weak antilocalization effect, quantitatively described using a modified Hikami\u2013Larkin\u2013Nagaoka equation. Temperature dependent magnetization (\n M<\/jats:italic>\n \u2013\n T<\/jats:italic>\n ) curves and magnetic field dependent isothermal magnetization (\n M<\/jats:italic>\n \u2013\n B<\/jats:italic>\n ) curves reveal the existence of weak ferromagnetic phase at very low temperatures. The weak field magnetoconductivity data follows the -\n \n \n \n <\/jats:tex-math>\n \n \n \n ln<\/mml:mi>\n <\/mml:mrow>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula>\n (\n B<\/jats:italic>\n ) dependency and the observed strong high field dHvA oscillations in (\n M<\/jats:italic>\n \u2013\n B<\/jats:italic>\n ) curves, provide the evidence of non-zero Berry phase, confirms the non-trivial band topology. These signatures indicate that Ni\n 0.5<\/jats:sub>\n Co\n 0.5<\/jats:sub>\n Se is a topological nodal line semimetal. In Hall resistivity data, significant AHE is observed at 2\u2009K to 5\u2009K and the linear behavior of the anomalous Hall resistivity (\n \n \n \n <\/jats:tex-math>\n \n \n \n \u03c1<\/mml:mi>\n \n x<\/mml:mi>\n y<\/mml:mi>\n <\/mml:mrow>\n A<\/mml:mi>\n <\/mml:msubsup>\n <\/mml:mrow>\n <\/mml:math>\n <\/jats:inline-formula>\n ) with\n \u03c1<\/jats:italic>\n \n xx<\/jats:italic>\n <\/jats:sub>\n signifies that the extrinsic skew scattering mechanism contributes to AHE in Ni\n 0.5<\/jats:sub>\n Co\n 0.5<\/jats:sub>\n Se.\n <\/jats:p>","DOI":"10.1088\/1361-648x\/ae44de","type":"journal-article","created":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T22:53:22Z","timestamp":1770850402000},"page":"075601","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["de Haas-van Alphen oscillations and anomalous Hall effect in topological nodal line semimetal Ni\n 0.5<\/sub>\n Co\n 0.5<\/sub>\n Se"],"prefix":"10.1088","volume":"38","author":[{"given":"Sharadnarayan","family":"Pradhan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sanand Kumar","family":"Pradhan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5995-1263","authenticated-orcid":true,"given":"Priyanath","family":"Mal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3681-9523","authenticated-orcid":true,"given":"Laxmipriya","family":"Sahoo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1831-8685","authenticated-orcid":true,"given":"P","family":"Rambabu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9497-3633","authenticated-orcid":true,"given":"Archana","family":"Lakhani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3182-8818","authenticated-orcid":true,"given":"Niharika","family":"Mohapatra","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bipul","family":"Das","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1435-4091","authenticated-orcid":true,"given":"G R","family":"Turpu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6407-8630","authenticated-orcid":true,"given":"Pradip","family":"Das","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"266","published-online":{"date-parts":[[2026,2,19]]},"reference":[{"key":"cmae44debib1","doi-asserted-by":"publisher","first-page":"1057","DOI":"10.1103\/RevModPhys.83.1057","type":"journal-article","volume":"83","author":"Qi","year":"2011","journal-title":"Rev. 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