Spin amplitude modulation driven magnetoelectic coupling in the new multiferroic FeTe${}_2$O${}_5$Br

Abstract

Magnetic and ferroelectric properties of layered geometrically frustrated cluster compound FeTe${}_2$O${}_5$Br were investigated with single-crystal neutron diffraction and dielectric measurements. Incommensurate amplitude modulated magnetic order with the wave vector $\mathbf{q}$=($\half$, 0.463, 0) develops below $T_N=10.6(2)\mathrm{K}$. Simultaneously, a ferroelectric order with the spontaneous polarization perpendicular to $\mathbf{q}$ and to Fe${}^{3+}$ magnetic moments emerges. The observed ferroelectricity and extraordinary linear scaling of the ferroelectric and magnetic order parameter are provoked by the striction of the intercluster Fe-O-Te-O-Fe bridges leading to the shift of Te${}^{4+}$ ions and polarization of their lone-pair electrons.

References in corpus (11)

• Spin current and magneto-electric effect in non-collinear magnets
• Ferroelectricity in spiral magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Magnetically driven ferroelectric order in Ni${}_3$V${}_2$O${}_8$
• Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites
• Direct transition from a disordered to a multiferroic phase on a triangular lattice
• Field induced linear magneto-elastic coupling in multiferroic TbMnO3
• Towards a Microscopic Model of Magnetoelectric Interactions in Ni3V2O8
• Relationship between Magnetic Structure and Ferroelectricity of LiVCuO4
• Multiferroicity induced by dislocated spin-density waves
• Quantum Dynamics of Multiferroic Helimagnets: a Schwinger-Boson Approach

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• Investigation of infrared phonon modes in multiferroic single-crystal FeTe${}_2$O${}_5$Br
• Persistent spin dynamics intrinsic to amplitude-modulated long-range magnetic order
• Multiferroic FeTe${}_2$O${}_5$Br: Alternating spin chains with frustrated interchain interactions
• Magnetic phase diagram of the multiferroic FeTe${}_2$O${}_5$Br
• Chemical pressure effects on structural, dielectric and magnetic properties of solid solutions Mn3-xCoxTeO6
• Multiferroicity in the geometrically frustrated FeTe2O5Cl
• Incommensurate atomic and magnetic modulations in the spin-frustrated β-NaMnO2 triangular lattice
• Role of Te in the low dimensional multiferroic material FeTe2O5Br
• Interpretation of magnetoelectric phase states using the praphase concept and exchange symmetry
• Evolution of magnetic and crystal structures in the multiferroic FeTe2O5Br
• Electronic and magnetic properties of low dimensional system Co2TeO3Cl2
• Magnetodielectric coupling and multi-blocking effect in the Ising-chain magnet Sr2Ca2CoMn2O9