Monte Carlo Investigation of Magnetization in Small Ferromagnetic Heisenberg Nanoparticles

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• 作者：A. Razouk ; M. Sahlaoui ; S. Eddahri…
• 关键词：Monte Carlo simulation ; Heisenberg model ; Nanoparticles ; Finite ; size effects ; Surface effects ; Magnetization
• 刊名：Journal of Superconductivity and Novel Magnetism
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：30
• 期：2
• 页码：425-430
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1557-1947
• 卷排序：30

文摘

Using the classical Heisenberg model and Monte Carlo simulations in the canonical ensemble, the effect of form, finite-size, and surface roughness on magnetization is investigated for ferromagnetic nanoparticle with uniaxial anisotropy and different nanoparticle shapes. In this work, cubical and spherical nanoparticles are considered; we have considered a simple nanoparticle where each site is occupied by a classical Heisenberg spin. Our numerical results show that the nanoparticle size and surface roughness have an impact and a considerable influence on the magnetic properties of these nanoparticles. But the influence of nanoparticle shapes is less significant when comparing magnetic behavior for cubical and spherical forms of the particle in a smooth or rough surface.