POLARIZED NEUTRON REFLECTION AS A PROBE OF MAGNETIC-FILMS AND MULTILAYERS

被引:174
作者
BLUNDELL, SJ
BLAND, JAC
机构
[1] Cavendish Laboratory, Cambridge, CB3 0HE, Madingley Road
来源
PHYSICAL REVIEW B | 1992年 / 46卷 / 06期
关键词
D O I
10.1103/PhysRevB.46.3391
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The application of polarized neutron reflection (PNR) to the study of the magnetic properties of thin films and multilayers is described. It is demonstrated that PNR provides a means of directly determining the magnetization-vector profile in multilayers of known layer thickness and layer density. Thus, the magnetization reversal process in these systems can be directly studied. A matrix method is presented which can be used to calculate the spin-dependent reflectivity from a multilayer with general in-plane orientation of the magnetic moment in each layer. In addition, we show that behavior of the spin asymmetry is dominated by multiple reflections and refraction just above the critical wave vector, but with increasing wave vector, such processes become progressively less important, and the response moves towards a "diffraction limit" in which a Fourier-transform approximation to the exact result can be used. The ideas in this paper are illustrated by a number of examples, including the exchange-biased structure Ag/Fe-Ni/Cu/Fe-Ni/Fe-Mn/Si.
引用
收藏
页码:3391 / 3400
页数:10
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