Magnetoelectricity in the system RAl3 (BO3) 4 (R = Tb, Ho, Er, Tm)

K. C. Liang, R. P. Chaudhury, B. Lorenz, Y. Y. Sun, L. N. Bezmaternykh, I. A. Gudim, V. L. Temerov, C. W. Chu

Research output: Contribution to journalConference articlepeer-review

39 Citations (Scopus)

Abstract

The magnetoelectric effect in the system RAl3(BO 3)4 (R = Tb, Ho, Er, Tm) is investigated between 3 K and room temperature and at magnetic fields up to 70 kOe. We show a systematic increase of the magnetoelectric effect with decreasing magnetic anisotropy of the rare earth moment. A giant magnetoelectric polarization is found in the magnetically (nearly) isotropic HoAl3(BO3)4. The polarization value in transverse field geometry at 70 kOe reaches 3600 μC/m2 which is significantly higher than reported values for the field-induced polarization of linear magnetoelectric or even multiferroic compounds. The results indicate a very strong coupling of the f-moments to the lattice. They further indicate the importance of the field-induced ionic displacements in the unit cell resulting in a polar distortion and a change in symmetry on a microscopic scale. The system RAl3(BO3) 4 could be interesting for the technological utilization of the high-field magnetoelectric effect.

Original languageEnglish
Article number032046
JournalJournal of Physics: Conference Series
Volume400
Issue numberPART 3
DOIs
Publication statusPublished - 2012
Event26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
Duration: 2011 Aug 102011 Aug 17

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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