Abstract
By combining dielectric, specific heat, and magnetization measurements and high-resolution neutron powder diffraction, we have investigated the thermodynamic and magnetic and structural properties of the metastable orthorhombic perovskite ${\mathrm{ErMnO}}_{3}$ prepared by high-pressure synthesis. The system becomes antiferromagnetically correlated below $42\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ and undergoes a lock-in transition at $28\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ with propagation wave vector $(0,{k}_{b},0)$, which remains incommensurate at low temperature. The intercorrelation between the magnetic structure and electric properties and the role of the rare earth moment are discussed.
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