期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 17, 期 10, 页码 1711-1718出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/17/10/025
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Magnetic domain walls in thin films can be well analysed using polarized,neutron reflectometry. Well defined streaks in the off-specular spin-flip scattering maps are explained by neutron refraction at perpendicular Neel walls. The position of the streaks depends only on the magnetic induction within the domains, whereas the intensity of the off-specular magnetic scattering depends on the spin-flip probability at the domain walls and on, the average size of the magnetic domains. This effect is fundamentally different and has to be clearly distinguished from diffuse scattering originating from the size distribution of magnetic domains. Polarized neutron reflectivity experiments were carried out using a He-3 gas spin filter with a analysing power as high as 96% and a neutron transmission of approximately 35%. Furthermore, the off-specular magnetic scattering was enhanced by using neutron resonance and neutron standing wave techniques.
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