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Absence of neutron diffraction line broadening due to polarization domains in the transverse spin-density-wave phase of chromium

1977; Elsevier BV; Volume: 21; Issue: 4 Linguagem: Inglês

10.1016/0038-1098(77)91244-3

1879-2766

Michael Steinitz, E. Fawcett, C. G. Windsor, F A Wedgwood, R. D. Lowde,

High-pressure geophysics and materials

Abstract A lower limit of 2500 A has been set for the dimension along the Q- direction of incoherent polarization domains in the transverse spin-density-wave phase of antiferromagnetic chromium by measuring the broadening of neutron diffraction satellite lines. This is substantially larger than the domain dimension that is thought correct on the basis of several other kinds of measurement. It follows that successive domains scatter neutrons coherently over at least this distance, perhaps because the 90° polarisation domain boundaries of Arrott and Werner occur only at the nodes of the spin density wave.