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Resonant x-ray scattering investigation of the multipolar ordering in Ca3Co2O6

DOI: 10.1103/PhysRevB.78.100406 DOI Help

Authors: S. Agrestini (ENSICAEN) , A. Bombardi (Diamond Light Source) , M. R. Lees (University of Warwick) , C. Mazzoli (ESRF)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 78 (10)

State: Published (Approved)
Published: September 2008

Abstract: We have performed a resonant x-ray scattering RXS study near the Co K edge on a single crystal of Ca3Co2O6. In the magnetically ordered phase a new class of weak reflections appears at the magnetic propagation vector 1, 3 , 1, 3 , 1, 3. These new reflections allow direct access to the dipolar-quadrupolar E1E2 scattering channel. The theoretical possibility of observing isolated E1E2 electromagnetic multipoles has attracted a lot of interest in recent years. Unfortunately in many systems of interest, parity even and parity odd tensor contributions occur at the same positions in reciprocal space. We demonstrate that in Ca3Co2O6 it is possible to completely separate the parity even from the parity odd terms. The possibility of observing such terms even in globally centrosymmetric systems using RXS has been investigated theoretically; Ca3Co2O6 allows a symmetry based separation of this contribution.

Subject Areas: Physics, Materials

Instruments: NONE-No attached Diamond beamline

Other Facilities: ESRF

Added On: 19/08/2009 23:07

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