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Title: Magnetic properties of cobalt-ferrite nanoparticles embedded in polystyrene resin

Abstract

Samples of maghemite and cobalt-ferrite nanoparticles (sizes, 3-10 nm) were prepared by cross-linking sulfonated polystyrene resin with aqueous solutions of (1) FeCl{sub 2}, (2) 80%FeCl{sub 2}+20%CoCl{sub 2}, (3) FeCl{sub 3}, and (4) 80%FeCl{sub 3}+20%CoCl{sub 2} by volume. Chemical analysis, x-ray powder-diffraction, and {sup 57}Fe Moessbauer spectroscopic measurements show that samples 1 and 3 consist of {gamma}-Fe{sub 2}O{sub 3} nanoparticles (sizes, {approx}10 and 3 nm) and sample 2 and 4 consist of Co{sub x}Fe{sub 3-x}O{sub 4} nanoparticles (sizes, {approx}10 and 4 nm). The temperature dependence of the zero-field-cooled and field-cooled magnetizations at low temperatures, together with a magnetic hysteresis in the M versus H data below blocking temperatures, demonstrate superparamagnetic behavior. The introduction of Co in the iron oxide-resin matrix results in an increase in the blocking temperature of nanoparticles.

Authors:
; ; ; ; ; ; ;  [1]
  1. Kettering University, Flint, Michigan 48504 (United States)
Publication Date:
OSTI Identifier:
20788131
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 99; Journal Issue: 8; Other Information: DOI: 10.1063/1.2165922; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AQUEOUS SOLUTIONS; CHEMICAL ANALYSIS; COBALT CHLORIDES; CROSS-LINKING; FERRITE; HYSTERESIS; IRON 57; IRON CHLORIDES; IRON OXIDES; MAGNETIC PROPERTIES; MAGNETIZATION; MOESSBAUER EFFECT; NANOSTRUCTURES; PARTICLES; POLYSTYRENE; RESINS; SUPERPARAMAGNETISM; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION

Citation Formats

Vaishnava, P P, Senaratne, U, Buc, E, Naik, R, Naik, V M, Tsoi, G, Wenger, L E, Boolchand, P, Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, University of Michigan-Dearborn, Dearborn, Michigan 48128, University of Alabama, Birmingham, Alabama 35294, and Department of ECECS, University of Cincinnati, Ohio 45221. Magnetic properties of cobalt-ferrite nanoparticles embedded in polystyrene resin. United States: N. p., 2006. Web. doi:10.1063/1.2165922.
Vaishnava, P P, Senaratne, U, Buc, E, Naik, R, Naik, V M, Tsoi, G, Wenger, L E, Boolchand, P, Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, University of Michigan-Dearborn, Dearborn, Michigan 48128, University of Alabama, Birmingham, Alabama 35294, & Department of ECECS, University of Cincinnati, Ohio 45221. Magnetic properties of cobalt-ferrite nanoparticles embedded in polystyrene resin. United States. doi:10.1063/1.2165922.
Vaishnava, P P, Senaratne, U, Buc, E, Naik, R, Naik, V M, Tsoi, G, Wenger, L E, Boolchand, P, Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, University of Michigan-Dearborn, Dearborn, Michigan 48128, University of Alabama, Birmingham, Alabama 35294, and Department of ECECS, University of Cincinnati, Ohio 45221. Sat . "Magnetic properties of cobalt-ferrite nanoparticles embedded in polystyrene resin". United States. doi:10.1063/1.2165922.
@article{osti_20788131,
title = {Magnetic properties of cobalt-ferrite nanoparticles embedded in polystyrene resin},
author = {Vaishnava, P P and Senaratne, U and Buc, E and Naik, R and Naik, V M and Tsoi, G and Wenger, L E and Boolchand, P and Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201 and University of Michigan-Dearborn, Dearborn, Michigan 48128 and University of Alabama, Birmingham, Alabama 35294 and Department of ECECS, University of Cincinnati, Ohio 45221},
abstractNote = {Samples of maghemite and cobalt-ferrite nanoparticles (sizes, 3-10 nm) were prepared by cross-linking sulfonated polystyrene resin with aqueous solutions of (1) FeCl{sub 2}, (2) 80%FeCl{sub 2}+20%CoCl{sub 2}, (3) FeCl{sub 3}, and (4) 80%FeCl{sub 3}+20%CoCl{sub 2} by volume. Chemical analysis, x-ray powder-diffraction, and {sup 57}Fe Moessbauer spectroscopic measurements show that samples 1 and 3 consist of {gamma}-Fe{sub 2}O{sub 3} nanoparticles (sizes, {approx}10 and 3 nm) and sample 2 and 4 consist of Co{sub x}Fe{sub 3-x}O{sub 4} nanoparticles (sizes, {approx}10 and 4 nm). The temperature dependence of the zero-field-cooled and field-cooled magnetizations at low temperatures, together with a magnetic hysteresis in the M versus H data below blocking temperatures, demonstrate superparamagnetic behavior. The introduction of Co in the iron oxide-resin matrix results in an increase in the blocking temperature of nanoparticles.},
doi = {10.1063/1.2165922},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 8,
volume = 99,
place = {United States},
year = {2006},
month = {4}
}