Abstract
We have investigated ferroelectric polarization memory effect in a magneto-electric (ME) multiferroic CuFe1-x GaxO2 (CFGO) with \(x=0.035\), which exhibits a spin-driven ferroelectric phase below \(T_{\text{C}}\sim 7\) K in zero magnetic field. In a previous study on CFGO(\(x=0.035\)), we have reported that the ferroelectric polarization induced by an applied electric field is retrieved after heating the sample to a non-ferroelectric high-temperature phase and then cooling down to the ferroelectric phase without electric field. [Mitsuda et al. Physica B 404 (2009) 2532] By measuring thermally stimulated electric current in detail, the previous study has elucidated that residual charges trapped in the sample are relevant to the memory effect. In the present study, we have performed polarized neutron diffraction measurements on CFGO(\(x=0.035\)) with applied electric fields, in order to investigate the multiferroic domain structure, which can reflect spatial distribution of internal electric fields due to t...
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