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Resonant x-ray scattering investigation of the multipolar ordering in Ca3Co2O6
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Bombardi, A., Mazzoli, C., Agrestini, S. and Lees, Martin R. (2008) Resonant x-ray scattering investigation of the multipolar ordering in Ca3Co2O6. Physical Review B (Condensed Matter and Materials Physics), Vol.78 (No.10). doi:10.1103/PhysRevB.78.100406
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Official URL: http://dx.doi.org/10.1103/PhysRevB.78.100406
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 (tau) over right arrow similar or equal to(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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Cobalt compounds, X-rays -- Scattering, Electromagnetism | ||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1098-0121 | ||||
| Official Date: | September 2008 | ||||
| Dates: |
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| Volume: | Vol.78 | ||||
| Number: | No.10 | ||||
| Number of Pages: | 5 | ||||
| DOI: | 10.1103/PhysRevB.78.100406 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||
| Grant number: | EP/C000757/1 (EPSRC) |
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