Dipolar spin-misalignment correlations in inhomogeneous magnets: Comparison between neutron scattering and micromagnetic approaches
Dipolar spin-misalignment correlations in inhomogeneous magnets: Comparison between neutron scattering and micromagnetic approaches
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DOI：
10.1103/physrevb.92.014427
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发表时间：
2015-07-30
影响因子：
3.7
通讯作者：
Michels, Andreas
中科院分区：
文献类型：
--
作者：
Erokhin, Sergey;Berkov, Dmitry;Michels, Andreas
在非均匀块状铁磁体中，自旋无序的主要来源与（i）局部饱和磁化强度的大小和（ii）磁各向异性场的大小和/或方向的空间变化有关。对于一个多孔铁磁体的特定的例子，其中的磁化强度的不均匀性是在最大值，我们证明，通过实验中子散射数据和微磁模拟，偶极相互作用引起的磁化强度波动的各向异性字符。
In inhomogeneous bulk ferromagnets, the dominating sources of spin disorder are related to spatial variations of (i) the magnitude of the local saturation magnetization and of (ii) the magnitude and/or direction of the magnetic anisotropy field. For the particular example of a porous ferromagnet, where the magnetization inhomogeneity is at maximum, we demonstrate, by means of experimental neutron scattering data and micromagnetic simulations, the anisotropic character of magnetization fluctuations induced by the dipolar interaction.