Size Effects in the Formation of an Uncompensated Ferromagnetic Moment in NiO Nanoparticles | Sciact - CRIS-system of Boreskov Institute of Catalysis

Size Effects in the Formation of an Uncompensated Ferromagnetic Moment in NiO Nanoparticles Full article

Journal

Journal of Applied Physics
ISSN: 0021-8979 , E-ISSN: 1089-7550

Output data

Year: 2019, Volume: 126, Number: 10, Article number : 103904, Pages count : 8 DOI: 10.1063/1.5109054

Tags

MAGNETIC-PROPERTIES; TEMPERATURE; SUSCEPTIBILITY; NANOFERRIHYDRITE; HYSTERESIS; SUBSYSTEMS; DEPENDENCE; ANOMALIES; BEHAVIOR; FIELDS

Authors

Popkov S.I. ¹ , Krasikov A.A. ¹ , Dubrovskiy A.A. ¹ , Volochaev M.N. ¹ , Kirillov V.L. ² , Martyanov O.N. ² , Balaev D.A. ¹

Affiliations

1	Kirensky Institute of Physics, Federal Research Center, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
2	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation

Funding (4)

1	Russian Foundation for Basic Research	18-42-240012 (АААА-А18-118102390052-8)
2	Ministry of Science and Higher Education of the Russian Federation
3	Красноярский краевой фонд поддержки научной и научно-технической деятельности
4	Правительство Красноярского края

The magnetic properties of samples of NiO nanoparticles with average sizes of 23, 8.5, and 4.5 nm were investigated. Using the magnetization curves measured in strong (up to 250 kOe) pulsed magnetic fields, the contributions of the free spin and ferromagnetic subsystems were extracted. It has been found that the ferromagnetic contribution increases with a decrease in the nanoparticle size and is proportional to the fraction of uncompensated exchange-coupled spins. It is demonstrated that the uncompensated spins form in the antiferromagnetic NiO oxide due to an increase in the fraction of surface atoms in the nanoparticles with decreasing particle size and defects in the bulk of particles. © 2019 Author(s).

Popkov S.I. , Krasikov A.A. , Dubrovskiy A.A. , Volochaev M.N. , Kirillov V.L. , Martyanov O.N. , Balaev D.A.
Size Effects in the Formation of an Uncompensated Ferromagnetic Moment in NiO Nanoparticles
Journal of Applied Physics. 2019. V.126. N10. 103904 :1-8. DOI: 10.1063/1.5109054 WOS Scopus РИНЦ AN OpenAlex

Submitted:	May 8, 2019
Accepted:	Aug 20, 2019
Published online:	Sep 11, 2019
Published print:	Sep 14, 2019

Web of science:	WOS:000486028500042
Scopus:	2-s2.0-85072192371
Elibrary:	41676855
Chemical Abstracts:	2019:1765165
OpenAlex:	W2972538360

DB	Citing
Scopus	30
Web of science	29
Elibrary	29
OpenAlex	33