Electric Polarization Induced by a Proper Helical Magnetic Ordering in a Delafossite Multiferroic CuFe1-xAlxO2

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dc.creatorNakajima, T.
dc.creatorMitsuda, S.
dc.creatorKanetsuki, S.
dc.creatorTanaka, K.
dc.creatorFujii, K.
dc.creatorTerada, N.
dc.creatorSoda, M.
dc.creatorMatsuura, M.
dc.creatorHirota, K.
dc.date2007-07-18
dc.date.accessioned2026-07-07T09:29:00Z
dc.date.available2026-07-07T09:29:00Z
dc.descriptionMultiferroic CuFe1-xAlxO2 (x=0.02) exhibits a ferroelectric ordering accompanied by a proper helical magnetic ordering below T=7K under zero magnetic field. By polarized neutron diffraction and pyroelectric measurements, we have revealed a one-to-one correspondence between the spin helicity and the direction of the spontaneous electric polarization. This result indicates that the spin helicity of the proper helical magnetic ordering is essential for the ferroelectricity in CuFe1-xAlxO2. The induction of the electric polarization by the proper helical magnetic ordering is, however, cannot be explained by the Katsura-Nagaosa-Balatsky model, which successfully explains the ferroelectricity in the recently explored ferroelectric helimagnets, such as TbMnO3. We thus conclude that CuFe1-xAlxO2 is a new class of magnetic ferroelectrics.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0707.2703
dc.identifierhttp://arxiv.org/abs/0707.2703
dc.identifierPhys. Rev. B 77, 052401 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.052401
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157628
dc.subjectStrongly Correlated Electrons
dc.titleElectric Polarization Induced by a Proper Helical Magnetic Ordering in a Delafossite Multiferroic CuFe1-xAlxO2
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