纳米复合材料上的磁中子散射：使用微磁学模拟解密截面图像
Magnetic neutron scattering on nanocomposites: decrypting cross-section images using micromagnetic simulations
摘要：
我们已经使用数值微磁学的纳米复合材料的磁（小角度）中子散射截面的计算。我们的方法的新颖之处在于在可能性研究的总磁散射的个人贡献的应用领域的依赖性。这种微磁工具是中子实验的理想补充，在中子实验中，通常只测量磁化的傅立叶分量的加权和。该过程提供了关于纳米磁体的磁性微结构和相应的磁性散射的独特和基本信息。特别是，我们的模拟结果解释了最近观察到的双相纳米复合材料中的偶极相关性，并提供了一个答案的问题的明确依赖的磁化傅立叶系数的散射矢量。
英文摘要：
We have used numerical micromagnetics for the calculation of the magnetic (small-angle) neutron scattering cross section of nanocomposites. The novel aspect of our approach consists in the possibility to study the applied-field dependence of the individual contributions to the total magnetic scattering. Such a micromagnetic tool ideally complements neutron experiments in which one generally measures only a weighted sum of the Fourier components of the magnetization. The procedure furnishes unique and fundamental information regarding the magnetic microstructure and corresponding magnetic scattering from nanomagnets. In particular, our simulation results explain the recent observation of dipolar correlations in two-phase nanocomposites and provide an answer to the question of the explicit dependence of the magnetization Fourier coefficients on the scattering vector.
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