title: NMR and spin relaxation in systems with magnetic nanoparticles.
abstract: The ¹H NMR spectra and spin dynamics of the host systems have been studied in liquid and solid suspensions of γ-Fe₂O₃ nanoparticles. Significant 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 the predomination of self-diffusion as a source of the relaxation in liquid suspensions, and estimate effective parameters of relaxation in the systems under study.
authors.affiliation: Norfolk State University, Centers for Materials Research, Norfolk, VA, USA.
authors.forename: N
authors.initials: N
authors.lastname: Noginova
authors.forename: T
authors.initials: T
authors.lastname: Weaver
authors.forename: M
authors.initials: M
authors.lastname: King
authors.forename: A B
authors.initials: AB
authors.lastname: Bourlinos
authors.forename: E P
authors.initials: EP
authors.lastname: Giannelis
authors.forename: V A
authors.initials: VA
authors.lastname: Atsarkin