Multiple small angle neutron scattering in ferromagnets
A. Z. Menshikov, S. G. Bogdanov, Y. N. Skryabin
Abstract
The conclusions arising from the multiple small angle neutron scattering theory, developed recently by S.V. Maleyev, R.V. Pomortsev and Y.N. Skryabin [Phys. Rev. B 50 7133 (1994)] for the value of Born parameter more than 1, are experimentally confirmed by magnetic scattering from domain structure of pure Fe and Ni, as well as Fe65Ni35 alloy. The crossover from multiple refraction to multiple Fraunhofer diffraction is found to be at a critical thickness L0, where dependence of the neutron beam broadening w on sample thickness L changes from law L1/2 to law L.
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