najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2017-8-3-371-377najo-614Research ArticlePHYSICSФИЗИКАPhase composition and magnetic properties of Ni1-xCoxFe2O4 nanocrystals with spinel structure, synthesized by Co-precipiationNguyenAnh Tien

Ho Chi Minh City

anhtienhcmup@gmail.comNguyenTien Dat

Ho Chi Minh City

tiendatpn@gmail.comMittovaV. O.

Voronezh 394036

vmittova@mail.ruBerezhnayaM. V.

Voronezh 394018

cnurova2010@yandex.ruMittovaI. Ya.

Voronezh 394018

imittova@mail.ruHo Chi Minh City Pedagogical UniversityViet NamBurdenko Voronezh State Medical UniversityRussian FederationVoronezh State UniversityRussian Federation20171108202583371377Copyright © Nguyen A.T., Nguyen T.D., Mittova V.O., Berezhnaya M.V., Mittova I.Y., 20252025Nguyen A.T., Nguyen T.D., Mittova V.O., Berezhnaya M.V., Mittova I.Y.Nguyen A.T., Nguyen T.D., Mittova V.O., Berezhnaya M.V., Mittova I.Y.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/614

Nanopowders of nickel ferrite doped with cobalt were synthesized by co-precipitation using a 3 % KOH solution as a precipitant. The effects of different annealing regimes on the composition and particle size of Ni1−xCoxFe2O4 were studied. It was established that with annealing at t = 1000 ◦C for 2 h single-phase products were formed with a crystallite size of 30–50 nm. The saturation magnetization and the coercive force increased as the content of the dopant increased from 50.3 emu/g and 51.94 Oe for NiFe2O4 to 80.45 emu/g and 848.32 Oe for CoFe2O4.

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The authors declare that there are no conflicts of interest present.