Surface effects in nanoparticles: application to maghemite -Fe O
نویسندگان
چکیده
منابع مشابه
Surface effects in nanoparticles : application to maghemite γ - Fe
We present a microscopic model for nanoparticles, of the maghemite (γ-Fe2O3) type, and perform classical Monte Carlo simulations of their magnetic properties. On account of Mössbauer spectroscopy and high-field magnetisation results, we consider a particle as composed of a core and a surface shell of constant thickness. The magnetic state in the particle is described by the anisotropic classica...
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An increasing number of promising applications for future technology is arising from size constraints in nanoparticles (NPs) and from the chemical manipulation of their surfaces. In this work, we analyse the finite-size and surface effects on polyacrylic acid-coated Fe(3)O(4) NPs and oleic acid-coated gamma-Fe(2)O(3) NPs by studying their magnetization curves at different temperatures. The meas...
متن کاملFinite-size and surface effects in maghemite nanoparticles: Monte Carlo simulations
Finite-size and surface effects in fine particle systems are investigated by Monte Carlo simulation of a model of a g-Fe2O3 ~maghemite! single particle. Periodic boundary conditions for a large enough system have been used to simulate the bulk properties and the results compared with those for a spherical shaped particle with free boundaries to evidence the role played by the surface on the ano...
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ژورنال
عنوان ژورنال: The European Physical Journal B
سال: 2000
ISSN: 1434-6028,1434-6036
DOI: 10.1007/s100510051079