Sol-gel synthesis and the investigation of the properties of nanocrystalline holmium orthoferrite
https://doi.org/10.17586/2220-8054-2020-11-6-698-704
Abstract
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.
Keywords
Supporting agencies: Nguyen Anh Tien is grateful for the financial support of Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam, through Grant No. CS.2020.19.21.
About the Authors
A. T. Nguyen
Ho Chi Minh City University of Education
Viet Nam
Viet Nam
Ho Chi Minh City 700000
H.L.T. Tran
Ho Chi Minh City University of Education
Viet Nam
Viet Nam
Ho Chi Minh City 700000
Ph.U.T. Nguyen
Ho Chi Minh City University of Education
Viet Nam
Viet Nam
Ho Chi Minh City 700000
I. Ya. Mittova
Voronezh State University
Russian Federation
Russian Federation
Universitetskaya pl. 1, Voronezh, 394018
V. O. Mittova
Burdenko Voronezh State Medical University
Russian Federation
Russian Federation
Voronezh, 394036
E. L. Viryutina
Voronezh State University
Russian Federation
Russian Federation
Universitetskaya pl. 1, Voronezh, 394018
V. H. Nguyen
Dong Thap University
Viet Nam
Viet Nam
Cao Lanh City 81000
X. V. Bui
Sai Gon University
Viet Nam
Viet Nam
Ho Chi Minh City, 700000
T. L. Nguyen
Institute of Fundamental and Applied Sciences, Duy Tan University; Faculty of Environmental and Chemical Engineering, Duy Tan University
Viet Nam
Viet Nam
Ho Chi Minh City, 700000
Da Nang, 550000
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For citations:
Nguyen A.T., Tran H., Nguyen P., Mittova I.Ya., Mittova V.O., Viryutina E.L., Nguyen V.H., Bui X.V., Nguyen T.L. Sol-gel synthesis and the investigation of the properties of nanocrystalline holmium orthoferrite. Nanosystems: Physics, Chemistry, Mathematics. 2020;11(6):698–704. https://doi.org/10.17586/2220-8054-2020-11-6-698-704
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