The following investigations have been carried out on the basis of our previous work [1]. The (002) intensities of neutron diffraction from α-LiIO3 single crystals under a DC or AC field along the c-axis were measured in various eases. (1) With a DC field applied at a temperature below 180 K or so, no enhancement is found to appear. When the DC field is applied at room temperature and the sample then cooled down to 180 K or even lower (e. g liquid nitrogen temperature), the magnitude of the diffraction intensity enhancement initially observed at room temperature remains the same, even after removing the applied voltage. (2) When a narrow neutron beam is scanned across a thicker crystal and a DC field applied, the diffraction intensity enhancement is not limited to the region near the electrodes, but also appears in each scanned region. (3) When a low-frequency AC field is applied, the enhancement decreases as the frequency increases for the same Vs.m.s. Above 1500 c/s the effect becomes negligible.