Strong magnetoelastic effect on the magnetoelectric phenomena of TbMn${}_2$O${}_5$

Abstract

Comparative studies of magnetoelectric susceptibility ($\alpha$), magnetization ($M$), and magnetostriction ($u$) in TbMn${}_2$O${}_5$ reveal that the increment of $M$ owing to the field-induced Tb${}^{3+}$ spin alignment coins a field-asymmetric line shape in the $\alpha (H)$ curve, being conspicuous in a low temperature incommensurate phase but persistently subsisting in the entire ferroelectric phase. Correlations among electric polarization, $u$, and $M^2$ variation represent linear relationships, unambiguously showing the significant role of Tb magnetoelastic effects on the low field magnetoelectric phenomena of TbMn${}_2$O${}_5$. An effective free energy capturing the observed experimental features is also suggested.

10 pages, 4 figures. Accepted in Physical Review B Rapid Communication

References in corpus (6)

• Structural Anomalies at the Magnetic and Ferroelectric Transitions in $RM{n}_2{O}_5$ (R=Tb, Dy, Ho)
• Quantitative determination of anisotropic magnetoelectric coupling in BiFeO${}_3$-CoFe${}_2$O${}_4$ nanostructures
• Observation of a multiferroic critical end point
• Non-resonant and Resonant X-ray Scattering Studies on Multiferroic TbMn2O5
• Local Structure of Multiferroic TbMn2O5: Evidence for an Anomalous Terbium Oxygen Distribution
• Theory of magnetic field-induced metaelectric critical end point in BiMn${}_2$O${}_5$

Cited by in corpus (3)

• Probing Magnetoelastic Coupling and Structural Changes in Magnetoelectric Gallium Ferrite
• Independent ferroelectric contributions and rare-earth-induced polarization reversal in multiferroic TbMn2O5
• Probing the role of Nd3+ ions in the weak multiferroic character of NdMn2O5 by optical spectroscopies