An x-ray resonant diffraction study of multiferroic DyMn2O5

Abstract

X-ray resonant scattering has been used to measure the magnetic order of the Dy ions below 40K in multiferroic DyMn${}_2$O${}_5$. The magnetic order has a complex behaviour. There are several different ordering wavevectors, both incommensurate and commensurate, as the temperature is varied. In addition a non-magnetic signal at twice the wavevector of one of the commensurate signals is observed, the maximum intensity of which occurs at the same temperature as a local maximum in the ferroelectric polarisation. Some of the results, which bear resemblence to the behaviour of other members of the RMn${}_2$O${}_5$ family of multiferroic materials, may be explained by a theory based on so-called acentric spin-density waves.

8 pages, 8 figures

References in corpus (1)

• Spin current and magneto-electric effect in non-collinear magnets

Cited by in corpus (1)

• Ordering of localized electronic states in multiferroic TbMnO3: a soft X-ray resonant scattering study