Colossal Linear Magnetoelectricity in Polar Magnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Mo</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>8</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Yuting Chang, Yakui Weng, Yunlong Xie, Bin You, Junfeng Wang, Liang Li, Jun‐Ming Liu, Shuai Dong, Chengliang Lu
Abstract
The linear magnetoelectric effect is an attractive phenomenon in condensed matters and provides indispensable technological functionalities. Here a colossal linear magnetoelectric effect with diagonal component ${\ensuremath{\alpha}}_{33}$ reaching up to $\ensuremath{\sim}480\text{ }\text{ }\mathrm{ps}/\mathrm{m}$ is reported in a polar magnet ${\mathrm{Fe}}_{2}{\mathrm{Mo}}_{3}{\mathrm{O}}_{8}$. This effect can persist in a broad range of magnetic field ($\ensuremath{\sim}20\text{ }\text{ }\mathrm{T}$) and is orders of magnitude larger than reported values in literature. Such an exceptional experimental observation can be well reproduced by a theoretical model affirmatively unveiling the vital contributions from the exchange striction, while the sign difference of magnetocrystalline anisotropy can also be reasonably figured out.