Magnetodielectric and magnetoelastic coupling in TbFe3(BO3)4

Abstract

We have studied the magnetodielectric and magnetoelastic coupling in TbFe3(BO3)4 single crystals by means of capacitance, magnetostriction and Raman spectroscopy measurements. The data reveal strong magnetic field effects on the dielectric constant and on the macroscopic sample length which are associated to long range magnetic ordering and a field-driven metamagnetic transition. We discuss the coupling of the dielectric, structural, and magnetic order parameters and attribute the origin of the magnetodielectric coupling to phonon mode shifts according to the Lyddane-Sachs-Teller (LST) relation.

Accepted for publication in Physical Review B

References in corpus (3)

• Raman scattering from phonons and magnons in RFe3)BO3)4
• Evidence for differentiation in the iron-helicoidal-chain in GdFe${}_3$(BO${}_3$)${}_4$
• Magnetization and specific heat of TbFe3(BO3)4: Experiment and crystal field calculations

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