CdV2O4: A rare example of a collinear multiferroic spinel

Abstract

By studying the dielectric properties of the geometrically frustrated spinel CdV2O4, we observe ferroelectricity developing at the transition into the collinear antiferromagnetic ground state. In this multiferroic spinel, ferroelectricity is driven by local magnetostriction and not by the more common scenario of spiral magnetism. The experimental findings are corroborated by ab-initio calculations of the electric polarization and the underlying spin and orbital order. The results point towards a charge rearrangement due to dimerization, where electronic correlations and the proximity to the insulator-metal transition play an important role.

4+ pages, 3 figures

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• Polyhedral distortions and unusual magnetic order in spinel FeMn${}_2$O${}_4$
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• Multiferroicity and magneto-electric effect in Gd${}_2$BaNiO${}_5$
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• Novel magneto-electric multiferroics from first-principles
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• Ferroelectricity induced by cooperative orbital ordering and Peierls instability
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• Evolution of the magnetic and structural properties of Fe${}_{1-x}$Co${}_x$V${}_2$O${}_4$
• Effects of magnetic field and twin domains on magnetostructural phase mixture in Mn3O4: Raman scattering studies of untwinned crystals
• Orbital-selective behavior in Y5Mo2O12 and (Cd,Zn)V2O4
• A variety of elastic anomalies in orbital-active nearly-itinerant cobalt vanadate spinel
• Orbital- and spin-driven lattice instabilities in quasi-one-dimensional CaV${}_2$O${}_4$
• Topological solitons and bulk polarization switch in collinear type II multiferroics
• Microscopic model for magneto-electric coupling through lattice distortions
• Role of orbital degrees of freedom in investigating the magnetic properties of geometrically frustrated vanadium spinels
• Double frustration and magneto-electro-elastic excitations in collinear multiferroic materials
• Real-Space Magnetic Imaging of the Multiferroic Spinels MnV2O4 and Mn3O4
• Exploring magneto-electric coupling through lattice distortions: insights from a pantograph model
• Structural stability of CuAl${}_2$O${}_4$ under pressure
• Coupled electricity and magnetism in solids: multiferroics and beyond
• Novel electronic states close to Mott transition in low-dimensional and frustrated systems
• The role of ionic sizes in inducing the cubic to tetragonal distortion in AV${}_2$O${}_4$ and ACr${}_2$O${}_4$ (A=Zn, Mg and Cd) compounds
• Large ferroelectric polarization in the new double perovskite NaLaMnWO${}_6$ induced by non-polar instabilities