Giant Magnetoelectric Effect in HoAl_3(BO_3)_4

Details Giant Magnetoelectric Effect in HoAl_3(BO_3)_4 Giant Magnetoelectric Effect in HoAl_3(BO_3)_4

2011-05-17

arxiv.org/abs/1105.3429v1

Phys. Rev. B 83, 180417(R) (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.83.180417

A giant magnetoelectric polarization is found in HoAl$_3$(BO$_3$)$_4$. The polarization in transverse field geometry at 70 kOe reaches 3600 $\mu C/m^2$ which is significantly higher than reported values of linear magnetoelectric or even multiferroic compounds. The magnetostrictive effect is also measured and compared with the magnetoelectricity. The results show that spin-lattice coupling in HoAl$_3$(BO$_3$)$_4$ is extremely strong and that the magnetic field causes a large polar distortion of the ionic positions in the unit cell.

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