It is shown by neutron diffraction that a relatively weak magnetic field (1.75 kG), is able to induce an order in a large terephthal-bis-(4n-butylaniline) (TBBA) sample in the smectic A phase. A monodomain is obtained with the planes perpendicular to the magnetic field. Rocking curves are performed whose full widths at half maximum give a value of a few degrees for the misorientations of the planes.
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Hervet et al. (1976) studied this question.