The nature of Ho magnetism in multiferroic HoMnO3

Abstract

Using x-ray resonant magnetic scattering and x-ray magnetic circular dichroism, techniques that are element specific, we have elucidated the role of Ho3+ in multiferroic HoMnO3. In zero field, Ho3+ orders antiferromagnetically with moments aligned along the hexagonal c direction below 40 K, and undergoes a transition to another magnetic structure below 4.5 K. In applied electric fields of up to 1x10^7 V/m, the magnetic structure of Ho3+ remains unchanged.

4 pages, 3 figures Manuscript accepted for publication in Phys. Rev. Lett. 2008

References in corpus (2)

• Enhanced ferroelectric polarization by induced Dy spin-order in multiferroic DyMnO3
• X-ray Resonant Scattering Study of the Order Parameters in Multiferroic TbMnO${}_3$

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• Non-Resonant X-ray Magnetic Scattering on Rare-Earth Iron Borates RFe${}_3$(BO${}_3$)${}_4$
• Magnetic order and single-ion anisotropy in Tb${}_3$Ga${}_5$O${}_{12}$
• Magnetization, specific heat, and thermal conductivity of hexagonal ErMnO${}_3$ single crystals
• Low-temperature heat transport and magnetic-structure transition of the hexagonal TmMnO_3 single crystals
• A model of magnetic order in hexagonal HoMnO3
• Asymmetric splitting of an antiferromagnetic resonance via quartic exchange interactions in multiferroic hexagonal HoMnO${}_3$
• Interplay between spin dynamics and crystal field in multiferroic compound HoMnO${}_3$
• Giant Magnetic Fluctuations at the Critical Endpoint in Insulating HoMnO3
• Magnetic and orbital correlations in multiferroic CaMn${}_7$O${}_{12}$ probed by x-ray resonant elastic scattering