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NMR and Spin Relaxation in Systems with Magnetic Nanoparticles

Published online by Cambridge University Press:  26 February 2011

T. Weaver ,
N. Noginova ,
M. King ,
A. B. Bourlinos ,
E. P. Giannelis  and
V. A. Atsarkin
T. Weaver
Affiliation:
t.l.harris@nsu.edu, NSU, Center for Materials Research, Norfok, VA, 23504, United States
N. Noginova
Affiliation:
nnoginova@nsu.edu, NSU, Center for Materials Research, Norfok, VA, 23504, United States
M. King
Affiliation:
marsh.king@gmail.com, NSU, Center for Materials Research, Norfok, VA, 23504, United States
A. B. Bourlinos
Affiliation:
ab363@cornell.edu, Institute of Materials Science, NCSR Demokritos, Athens, N/A, Greece
E. P. Giannelis
Affiliation:
EPG2@cornell.edu, Cornell University, Ithaca, NY, 14853, United States
V. A. Atsarkin
Affiliation:
atsarkin@splile.ru, Institute of Radio Engineering & Electronics RAS, Moscow, N/A, Russian Federation
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Abstract

To better understand the effects of magnetic nanoparticles to nuclear spectra and spin relaxation in different systems, we have studied 1H NMR spectra and spin dynamics of the host system in liquid and solid suspensions of γ-Fe2O3 nanoparticles. Significant line broadening of 1H NMR spectra and growing relaxation rates were observed with increased concentration of nanoparticles in the liquid systems, with the relation T1/T2 depending on the particular host. Solid systems demonstrate inhomogeneous broadening of the spectra and practically no dependence of T1 upon the nanoparticle concentration. We explain the experimental results taking into account predomination of diffusion as a source of the relaxation, and estimate effective parameters of relaxation in the systems in study.

Keywords

nuclear magnetic resonance (NMR)magnetic propertiesFe
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 984: Symposium MM – Magnetic Resonance in Material Science , 2006 , 0984-MM07-19
Copyright
Copyright © Materials Research Society 2007

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