McComb, D.W., Craven, A.J., Chioncel, L., Lichtenstein, A.I. and Docherty, F.T. (2003) Effect of short-range magnetic ordering on electron energy-loss spectra in spinels. Physical Review B, 68(22), 224420. (doi: 10.1103/PhysRevB.68.224420)
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Abstract
The energy-loss near-edge structure (ELNES) at the oxygen K edge in two AB/sub 2/O/sub 4/ spinels (A=Mg, B=Al, Cr) is reported. In MgAl/sub 2/O/sub 4/ the experimental data are successfully modelled within the local density approximation framework. In the case of MgCr/sub 2/O/sub 4/ spin polarization, in the form of antiferromagnetic ordering on the Cr sublattice, must be included despite the fact that the measurements were performed at approximately 30 times above T/sub N/. A model in which dynamic short-range antiferromagnetic ordering is present at room temperature is proposed to explain the results of the experiments and calculations.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Docherty, Dr Frances and Craven, Professor Alan |
| Authors: | McComb, D.W., Craven, A.J., Chioncel, L., Lichtenstein, A.I., and Docherty, F.T. |
| Subjects: | Q Science > QC Physics |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Physical Review B |
| Publisher: | American Physical Society |
| ISSN: | 1098-0121 |
| ISSN (Online): | 1550-235X |
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