Resonant x-ray magnetoelectric effect in a centrosymmetric spinel oxide

M. Matsubara, Y. Shimada, K. Ohgushi, T. Arima, Y. Tokura

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We show clear evidence that the local magnetoelectric (ME) effect arising from the noncentrosymmetric magnetic sites can be element-specifically detected by using the resonant x-ray ME scattering (XMES), even in systems where the space-inversion (I) or the time-reversal (R) symmetry is globally restored. At the (222) reflection in a centrosymmetric spinel oxide MnCr2 O4, where the conventional Mn-resonant x-ray magnetic scattering is forbidden, we have observed a resonant magnetic signal at the intra-atomic 1s-3d absorption edge of Mn ions on tetrahedral sites, which is uniquely attributed to the XMES. This unique x-ray scattering is caused by a transfer of the spectral weight between the electric dipole (E1) and electric quadrupole (E2) transitions through the spin-orbit coupling. The possibility of the important application utilizing the ME scattering technique is discussed as well.

Original languageEnglish
Article number180407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number18
DOIs
Publication statusPublished - 2009 May 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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