Abstract
We have measured the dielectric constant and the pyroelectric current of orthorhombic (space group $Pbam$) NdCrTiO${}_{5}$ polycrystalline samples. The dielectric constant and the pyroelectric current show features associated with ferroelectric transitions at the antiferromagnetic transition temperature (${T}_{N}$ $=$ 21 K). The effect of magnetic fields is to enhance the features almost linearly up to the maximum measured field (7 T) with a spontaneous polarization value of $\ensuremath{\sim}$3.5 $\ensuremath{\mu}$C/m${}^{2}$. Two possible scenarios, the linear magnetoelectric effect and multiferroicity (antiferromagnetism plus ferroelectricity), are discussed as possible explanations for the observations.
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