We have measured the dielectric constant and the pyroelectric current of orthorhombic (space group Pbam) NdCrTiO5 polycrystalline samples. The dielectric constant and the pyroelectric current show features associated with ferroelectric transitions at the antiferromagnetic transition temperature (TN = 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 ∼3.5μC/m2. Two possible scenarios, the linear magnetoelectric effect and multiferroicity (antiferromagnetism + ferroelectricity), are discussed as possible explanations for the observations.
@article{arxiv.1108.5754,
title = {Magneto-electric effect in NdCrTiO5},
author = {J. Hwang and E. S. Choi and H. D. Zhou and J. Lu and P. Schlottmann},
journal= {arXiv preprint arXiv:1108.5754},
year = {2015}
}