摘要翻译：
本文从经典统计物理的角度研究了非相互作用三维磁各向异性纳米颗粒的热力学平衡性质。根据磁场与各向异性轴的角依赖性($\alpha$),得到了能量景观图。对于$\alpha=\frac{\pi}{2}$,能量景观图显示了从双阱到单阱的连续跃迁，对于其他值$\alpha$,能量景观图显示了非对称双稳。本文的分析与解释纳米磁系的平衡磁化强度和静态磁化率随外加磁场$B$和温度$T$的变化有关。磁各向异性单畴粒子的磁化强度和磁化率证实了磁各向异性单畴粒子的非朗之万行为。磁化率分析建立了铁磁、反铁磁和顺磁耦合。这项研究揭示了磁各向异性能在解释非相互作用单畴纳米粒子集合的磁性行为中的重要作用。
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英文标题：
《Thermodynamic properties of magneto-anisotropic nanoparticles》
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作者：
Malay Bandyopadhyay
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最新提交年份：
2011
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分类信息：

一级分类：Physics        物理学
二级分类：Statistical Mechanics        统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
  The purpose of this paper is to study the thermodynamic equilibrium properties of a collection of non-interacting three-dimensional (3D) magnetically anisotropic nanoparticles in the light of classical statistical physics. Pertaining to the angular dependence ($\alpha$) of the magnetic field with the anisotropy axis, energy landscape plots are obtained which reveal a continuous transition from a double well to a single well for $\alpha=\frac{\pi}{2}$ and show asymmetric bistable shape for other values of $\alpha$. The present analysis is related with the interpretation of equilibrium magnetization and static susceptibility of nanomagnetic system as a function of external magnetic field, $B$, and temperature, $T$. The magnetization and susceptibility confirms the non Langevin behaviour of magneto-anisotropic monodomain particles. The susceptibility analysis establishes the ferromagnetic, antiferromagnetic and paramagnetic like coupling for various $\alpha$. This study reveals the essential role of magneto anisotropic energy in the interpretation of the magnetic behaviour of a collection of noninteracting single domain nanoparticles.
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PDF链接：
https://arxiv.org/pdf/706.3661