Magneto-electric materials are characterized by having coupled magnetic and electric polarizations. These are very interesting materials from the technological point of view, because they could allow, e.g., the control of magnetic properties of volatile/non-volatile computer memories through electric voltages. Therefore, it becomes extremely important to understand the fundamental properties of new magneto-electric materials, such as their vibrational spectrum and the magnitude of the coupling between these vibrations and the electronic states.
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