Magnetoelectricity and magnetostriction due to the rare-earth moment in TmAl3(BO3)(4)

作者：Chaudhury R P^*; Lorenz B; Sun Y Y; Bezmaternykh L N; Temerov V L; Chu C W

来源：Physical Review B, 2010, 81(22): 220402.

DOI：10.1103/PhysRevB.81.220402

The magnetic properties, the magnetostriction, and the magnetoelectric effect in the d-electron free rare-earth aluminum borate TmAl3(BO3)(4) are investigated between room temperature and 2 K. The magnetic susceptibility reveals a strong anisotropy with the hexagonal c axis as the hard magnetic axis. Magnetostriction measurements show a large effect of an in-plane field reducing both the a-axis and c-axis lattice parameters. The magnetoelectric polarization change in a and c directions reaches up to 300 mu C/ m(2) at 70 kOe with the field applied along the a axis. The magnetoelectric polarization is proportional to the lattice contraction in magnetic field. The results of this investigation prove the existence of a significant coupling between the rare-earth magnetic moment and the lattice in RAl3(BO3)(4) compounds (R=rare earth). They further show that the rare-earth moment itself will generate a large magnetoelectric effect which makes it easier to study and to understand the origin of the magnetoelectric interaction in this class of materials.

• 出版日期2010-6-2