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Title: Size and surface effects on the magnetism of magnetite and maghemite nanoparticles

Abstract

The size effects of magnetite and maghemite nanoparticles on their magnetic properties (magnetic moment, Curie temperature, blocking temperature, etc.) have been investigated. Magnetic separation and centrifugation of an aqueous solution of nanoparticles were used for their separation into fractions; their sizes were measured by atomic force microscopy, dynamic light scattering, and electron microscopy. A change in the size leads to a change in the Curie temperature and magnetic moment per formula unit. Both native nanoparticles and those covered with a bioresorbable layer have been considered. The magnetic properties have been calculated by the Monte Carlo method for the classical Heisenberg model with various bulk and surface magnetic moments.

Authors:
 [1]; ;  [2]
  1. Moscow State University (Russian Federation)
  2. Russian Academy of Sciences, Mikheev Institute of Metal Physics, Ural Branch (Russian Federation)
Publication Date:
OSTI Identifier:
22617064
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 124; Journal Issue: 2; Other Information: Copyright (c) 2017 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; AQUEOUS SOLUTIONS; ATOMIC FORCE MICROSCOPY; CENTRIFUGATION; CHANNELING; CURIE POINT; ELECTRON MICROSCOPY; ELECTRONS; HEISENBERG MODEL; LAYERS; LIGHT SCATTERING; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MAGNETISM; MAGNETITE; MONTE CARLO METHOD; NANOPARTICLES; SURFACES

Citation Formats

Nikiforov, V. N., E-mail: pppnvn@yandex.ru, Ignatenko, A. N., and Irkhin, V. Yu. Size and surface effects on the magnetism of magnetite and maghemite nanoparticles. United States: N. p., 2017. Web. doi:10.1134/S1063776117010046.
Nikiforov, V. N., E-mail: pppnvn@yandex.ru, Ignatenko, A. N., & Irkhin, V. Yu. Size and surface effects on the magnetism of magnetite and maghemite nanoparticles. United States. doi:10.1134/S1063776117010046.
Nikiforov, V. N., E-mail: pppnvn@yandex.ru, Ignatenko, A. N., and Irkhin, V. Yu. Wed . "Size and surface effects on the magnetism of magnetite and maghemite nanoparticles". United States. doi:10.1134/S1063776117010046.
@article{osti_22617064,
title = {Size and surface effects on the magnetism of magnetite and maghemite nanoparticles},
author = {Nikiforov, V. N., E-mail: pppnvn@yandex.ru and Ignatenko, A. N. and Irkhin, V. Yu.},
abstractNote = {The size effects of magnetite and maghemite nanoparticles on their magnetic properties (magnetic moment, Curie temperature, blocking temperature, etc.) have been investigated. Magnetic separation and centrifugation of an aqueous solution of nanoparticles were used for their separation into fractions; their sizes were measured by atomic force microscopy, dynamic light scattering, and electron microscopy. A change in the size leads to a change in the Curie temperature and magnetic moment per formula unit. Both native nanoparticles and those covered with a bioresorbable layer have been considered. The magnetic properties have been calculated by the Monte Carlo method for the classical Heisenberg model with various bulk and surface magnetic moments.},
doi = {10.1134/S1063776117010046},
journal = {Journal of Experimental and Theoretical Physics},
number = 2,
volume = 124,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2017},
month = {Wed Feb 15 00:00:00 EST 2017}
}