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首页> 外文期刊>Physica, B. Condensed Matter >Reflectivity and off-specular neutron scattering from the free ferrofluid surface and silicon-ferrofluid interface
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Reflectivity and off-specular neutron scattering from the free ferrofluid surface and silicon-ferrofluid interface

机译：来自自由铁磁流体表面和硅-铁磁流体界面的反射率和镜面中子散射

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Properties of the free ferrofluid (colloid of fine magnetite particles suspended in heavy water) surface and interface silicon-ferrofluid is studied by means of the neutron reflectivity and off-specular scattering. The measurements were performed in zero magnetic held, as well as in the presence of the field, applied within the surface (interface) plane, either perpendicular or parallel to the incoming beam. Proposed theoretical model allows deriving quantitative information about ferrofluid structure from the data of the interface measurements while consideration of the free surface data requires some additional contemplation. The experimental results collected, mainly in maps initial angle - scattered angle, were treated by means of two-dimensional fit (the least-squares routine) and values of the ferrofluid parameters such as correlation radius, critical angle, scattering length density were obtained ill dependence on value and direction of external magnetic field. The capability of polarized neutron reflection experiment for the investigation of the magnetization process in the vicinity of the ferrofluid free surface (interface) is discussed. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 6]
机译：利用中子反射率和镜外散射研究了自由铁磁流体（悬浮在重水中的磁铁矿细颗粒的胶体）表面和界面硅铁磁流体的特性。测量是在零磁场保持的情况下以及在垂直于或平行于入射光束的表面（界面）平面内施加的磁场的情况下进行的。提出的理论模型允许从界面测量数据中得出有关铁磁流体结构的定量信息，而考虑自由表面数据则需要一些额外的考虑。收集的实验结果主要是在地图的初始角度-散射角上，通过二维拟合（最小二乘例程）进行处理，得出铁磁流体参数的值（例如相关半径，临界角，散射长度密度）不佳。取决于外部磁场的值和方向。讨论了极化中子反射实验研究铁磁流体自由表面（界面）附近磁化过程的能力。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：6]

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