najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2020-11-6-698-704najo-386Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХSol-gel synthesis and the investigation of the properties of nanocrystalline holmium orthoferriteNguyenA. T.

Ho Chi Minh City 700000

vmittova@mail.ruTranH.L.T.

Ho Chi Minh City 700000

tran.hongle86@gmail.comNguyenPh.U.T.

Ho Chi Minh City 700000

nguyenphuonguyen0110@gmail.comMittovaI. Ya.

Universitetskaya pl. 1, Voronezh, 394018

imittova@mail.ruMittovaV. O.

Voronezh, 394036

vmittova@mail.ruViryutinaE. L.

Universitetskaya pl. 1, Voronezh, 394018

viryutina.helena@yandex.ruNguyenV. H.

Cao Lanh City 81000

nguyenvanhung@dthu.edu.vnBuiX. V.

Ho Chi Minh City, 700000

buixuanvuongsgu@gmail.comNguyenT. L.

Ho Chi Minh City, 700000

Da Nang, 550000

nguyentuanloi@duytan.edu.vnHo Chi Minh City University of EducationViet NamVoronezh State UniversityRussian FederationBurdenko Voronezh State Medical UniversityRussian FederationDong Thap UniversityViet NamSai Gon UniversityViet NamInstitute of Fundamental and Applied Sciences, Duy Tan University; Faculty of Environmental and Chemical Engineering, Duy Tan UniversityViet Nam202029072025116698–704Copyright © Nguyen A.T., Tran H., Nguyen P., Mittova I.Y., Mittova V.O., Viryutina E.L., Nguyen V.H., Bui X.V., Nguyen T.L., 20252025Nguyen A.T., Tran H., Nguyen P., Mittova I.Y., Mittova V.O., Viryutina E.L., Nguyen V.H., Bui X.V., Nguyen T.L.Nguyen A.T., Tran H., Nguyen P., Mittova I.Y., Mittova V.O., Viryutina E.L., Nguyen V.H., Bui X.V., Nguyen T.L.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/386

Holmium orthoferrite nanocrystals (HoFeO3) were synthesized from an aqueous solution by the sol-gel method, using polyvinyl alcohol as a stabilizer and annealing at temperatures of 650, 750, and 850 ◦C for an hour. According to the results of the performed analyses, it was found that with an increase in the annealing temperature, the average size of HoFeO3 crystallites increases from 24 to 30 nm. The magnetic characteristics of the samples were measured and it was shown that holmium orthoferrite is a paramagnet with a low coercive force. The band gap of nanocrystalline holmium ferrite is determined.

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