Multiferroicity due to nonstoichiometry in the chain cuprate LiVCuO_4

Abstract

The recently observed multiferroic behavior in the s=1/2 chain cuprate LiVCuO_4 (LiCuVO_4) with edge-shared CuO_4 plaquettes and helical spin ordering does not agree with the existing theories such as a spin-current scenario. We argue that the effect can be consistently explained, if the exchange-induced electric polarization on the out-of-chain Cu^2+ centers substituting for Li-ions in LiVCuO_4 is taken into account. These substituent centers are proved to be an effective probe of the spin incommensurability and the magnetic field effects.

7 pages, 5 figures, accepted in Europhys. Letters

References in corpus (10)

• Spin current and magneto-electric effect in non-collinear 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
• Spin-polarization coupling in multiferroic transition-metal oxides
• Spin-modulated quasi-1D antiferromagnet LiCuVO_4
• Multiferroicity induced by dislocated spin-density waves
• Dzyaloshinsky-Moriya antisymmetric exchange coupling in cuprates: Oxygen effects
• Electron localization/delocalization in incommensurate helical magnets
• The magnetic orders induced ferroelectricity

Cited by in corpus (8)

• Switching the Ferroelectric Polarization by External Magnetic Fields in the Spin = 1/2 Chain Cuprate LiCuVO4
• Cupric chloride CuCl2 as an S=1/2 chain multiferroic
• Microscopic mechanisms of spin-dependent electric polarization in 3d oxides
• Nonrelativistic Multiferroicity in the Nonstoichiometric Spin s=1/2 Spiral Chain Cuprate LiCu2O2
• Dzyaloshinskii interaction and exchange-relativistic effects in orthoferrites
• Colossal magnetocapacitive effect in differently synthesized and doped CdCr2S4
• Spiral ground state in the quasi-two-dimensional spin-1/2 system Cu2GeO4
• The magnetoelectric coupling in the multiferroic compound LiCu2O2