Transverse and lateral structure of the spin-flop phase in fe/cr antiferromagnetic superlattices.
Direct evidence of the nonuniformly canted state of the spin-flop phase induced by a magnetic field applied to Fe/Cr(100) superlattices is obtained by polarized neutron reflectometry. It is unambiguously demonstrated that the magnetization of the alternating Fe layers is twisted through the multilayer stack proving a stable noncollinear configuration. The maximal tilt at the end layers progressively reduces towards the center of the multilayer. The set of tilt angles is deduced from a model-free data evaluation employing the supermatrix routine. Spin-flip off-specular scattering is determined by the in-plane magnetization fluctuations and is fitted by a theoretical model of domains.
Lauter-Pasyuk
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Physik Department, TU München, D-85747 Garching, Germany.
Lauter
H J
HJ
Toperverg
B P
BP
Romashev
L
L
Ustinov
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V