Phase transitions of the ferroelectric $(\mathrm{ND}_4)_2\mathrm{FeCl}_5\cdot\mathrm{D}_2\mathrm{O}$ under a magnetic field
Shaozhi Li,
Randy S. Fishman
Abstract:Due to the strong coupling between magnetism and ferroelectricity, (ND4)2FeCl5 • D2O exhibits several intriguing magnetic and electric phases. In this letter, we include high-order onsite spin anisotropic interactions in a spin model that successfully captures the ferroelectric phase transitions of (ND4)2FeCl5 • D2O under a magnetic field and produces the large weights of high-order harmonic components in the cycloid structure that are observed from neutron diffraction experiments. Moreover, we predict a new f… Show more
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