Magnetodielectric and magnetoelastic coupling in TbFe3(BO3)4
Umut Adem, Liran Wang, Daniele Fausti, Wolf Schottenhamel, Paul H.M., van Loosdrecht, Alexander Vasiliev, Leonard N. Bezmaternykh, Bernd B\"uchner,, Christian Hess, R\"udiger Klingeler
TL;DR
This study investigates the magnetodielectric and magnetoelastic properties of TbFe3(BO3)4 single crystals, revealing strong magnetic field effects linked to magnetic ordering and transitions, with coupling explained via phonon mode shifts.
Contribution
The paper provides new insights into the coupling mechanisms in TbFe3(BO3)4, highlighting the role of phonon mode shifts in magnetodielectric effects.
Findings
Magnetic field significantly affects dielectric constant and sample length.
Long-range magnetic order and metamagnetic transition observed.
Magnetodielectric coupling attributed to phonon mode shifts via LST relation.
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.
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