论文标题
中子研究无稀土MN-BI磁铁中的磁相关性
Neutron study of magnetic correlations in rare-earth-free Mn-Bi magnets
论文作者
论文摘要
我们报告了对基于MN-BI的无稀土永久磁体的一项非极化小角度中子散射（SAN）研究的结果。磁体横截面由长波长横向磁化波动主导，并已根据吉尼尔 - 帕罗德模型和距离分布函数进行了分析。这提供了回旋的半径，在不远的状态下，调查了三种不同的合金构图，介于$ 220-240 \，\ mathrm {nm} $之间。此外，从Guinier-Porod模型获得的所谓的$ S $参数的结果计算距离分布函数表明，Mn $ _ {45} $ bi $ $ $ $ _ {55} $样本的磁散射起源于略微形状 - 动型 - 抗氧基结构。
We report the results of an unpolarized small-angle neutron scattering (SANS) study on Mn-Bi-based rare-earth-free permanent magnets. The magnetic SANS cross section is dominated by long-wavelength transversal magnetization fluctuations and has been analyzed in terms of the Guinier-Porod model and the distance distribution function. This provides the radius of gyration which, in the remanent state, ranges between about $220-240 \, \mathrm{nm}$ for the three different alloy compositions investigated. Moreover, computation of the distance distribution function in conjunction with results for the so-called $s$-parameter obtained from the Guinier-Porod model indicate that the magnetic scattering of a Mn$_{45}$Bi$_{55}$ sample has its origin in slightly shape-anisotropic structures.
