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Polarized small-angle neutron scattering study of two-dimensional spatially ordered systems of nickel nanowires

J. Appl. Cryst. (2007). 40, s532–s536 [doi:10.1107/S0021889807005559]

[nickel nanowires] Field dependence of the integrated intensity for perpendicular magnetic field
Magnetic and structural properties of two-dimensional spatially ordered systems of ferromagnetic nickel nanowires embedded into an Al2O3 matrix have been studied using polarized small-angle neutron scattering. An external magnetic field was applied perpendicular or parallel to the long dimension of the nanowires in order to reveal the anisotropic properties of the magnetic system. It is shown that, firstly, the magnetic-field-dependent scattering IH(q) provides new and principally different information as compared with the interference term ΔI(q). Secondly, two contributions to the interference term ΔI(q) (ascribed to the diffuse scattering and to the diffraction peaks) have different signs indicating different origins of the scattering objects. Thirdly, polarized SANS gives a detailed picture of the magnetization process, which could not be obtained by methods of standard magnetometry.

N.A. Grigoryeva, S.V. Grigoriev, H. Eckerlebe, A.A. Eliseev, A.V. Lukashin and K.S. Napolskii