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

Abstract

Soft X-ray resonant scattering (XRS) has been used to observe directly, for the first time, the ordering of localized electronic states on both the Mn and Tb sites in multiferroic TbMnO${}_3$. Large resonant enhancement of the X-ray scattering cross-section were observed when the incident photon energy was tuned to either the Mn $L$ or Tb $M$ edges which provide information on the Mn 3d and Tb $4f$ electronic states, respectively. The temperature dependence of the XRS signal establishes, in a model independent way, that in the high-temperature phase (28 K $\le$ T $\le$ 42 K) the Mn 3d sublattices displays long-range order. The Tb $4f$ sublattices are found to order only on entering the combined ferroelectric/magnetic state below 28 K. Our results are discussed with respect to recent hard XRS experiments (sensitive to spatially extended orbitals) and neutron scattering.

arXiv comment9 pages, paper has been accepted for publication in Journal of Physics: Condensed Matter as a fast track communication

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Cited by in corpus (9)

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• Circularly polarised X-rays as a probe of non-collinear magnetic order in multiferroic TbMnO3
• RASOR: An advanced instrument for soft x-ray reflectivity and diffraction
• The Spin-Reorientation Transition in TmFeO3
• Circularly Polarised X-ray Scattering Investigation of Spin-Lattice Coupling in TbMnO${}_3$ in Crossed Electric and Magnetic Fields
• Dynamic pathway of the photoinduced phase transition of TbMnO${}_3$
• Long range antiferromagnetic order of formally non-magnetic Eu${}^{3+}$ Van Vleck ions observed in multiferroic Eu${}_{1-x}$Y${}_x$MnO${}_3$