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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Cited by in corpus (8)

• Advances in ab-initio theory of Multiferroics. Materials and mechanisms: modelling and understanding
• Effect of pressure on the electronic and magnetic properties of CdV${}_2$O${}_4$: Density functional theory studies
• Multiferroicity and magneto-electric effect in Gd${}_2$BaNiO${}_5$
• Magnetostriction and ferroelectric state in AgCrS${}_2$
• Novel magneto-electric multiferroics from first-principles
• Magnetic excitations and anomalous spin wave broadening in multiferroic FeV2O4
• Multiple lattice instabilities resolved by magnetic-field and disorder sensitivities in cubic paramagnetic phase of the orbital-degenerate frustrated spinel MgV${}_2$O${}_4$
• Orbital disorder induced by charge fluctuations in vanadium spinels