Magneto-electric effect in NdCrTiO5

Details Magneto-electric effect in NdCrTiO5 Magneto-electric effect in NdCrTiO5

2011-08-29

arxiv.org/abs/1108.5754v4

Physics

Condensed Matter

Materials Science

7 pages, 6 figures

Scientific paper

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 ($T_{\text{N}}$ = 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 $\sim 3.5 \mu$C/m$^2$. Two possible scenarios, the linear magnetoelectric effect and multiferroicity (antiferromagnetism + ferroelectricity), are discussed as possible explanations for the observations.

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