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Compton scattering studies of 4f ferromagnetism
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Cooper, Malcolm, Duffy, J. A., Banfield, Z. F., Bebb, A. M., Blaauw, L., Shenton-Taylor, C., Steer, C. and Taylor, J. W. (2006) Compton scattering studies of 4f ferromagnetism. In: 20th International Conference on X-Ray and Inner-Shell Processes, Univ Melbourne, Melbourne, AUSTRALIA, JUL 04-08, 2005. Published in: RADIATION PHYSICS AND CHEMISTRY, 75 (11). pp. 1638-1645. doi:10.1016/j.radphyschem.2005.07.034 ISSN 0969-806X.
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Official URL: http://dx.doi.org/10.1016/j.radphyschem.2005.07.03...
Abstract
Ferromagnetism can be studied in Compton scattering experiments, which use high-energy, elliptically polarised synchrotron radiation. The basis of the method and its interpretation in terms of site-specific moments will be explained and illustrated by a series of examples of archetypal compounds. For example, the hexaborides exhibit a wide range of electronic properties. Data will be presented for the heavy Fermion system CeB6 and the controversial ferromagnet Ca1-xLaxB6. Undoped CeB6 exhibits a delocalised spin moment, more characteristic of the 5d than the 4f orbital. Whereas the magnetism in the Ca1-xLaxB6 System has been suggested to be an extrinsic effect arising from iron contamination, our data indicate that the magnetism is intrinsic and inconsistent with what would be expected for an iron 3d moment. This supports the proposal that this system is, indeed, a weak itinerant ferromagnet. In Ru(2)SrGdCu(2)0(8), we observe a combination of Gd 4f, Gd 5d and Ru 4d moments and the 5d moment appears to flip orientation below the Neel temperature. (c) 2006 Elsevier Ltd. All rights reserved.
| Item Type: | Conference Item (UNSPECIFIED) | ||||
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| Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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| Journal or Publication Title: | RADIATION PHYSICS AND CHEMISTRY | ||||
| Publisher: | PERGAMON-ELSEVIER SCIENCE LTD | ||||
| ISSN: | 0969-806X | ||||
| Official Date: | November 2006 | ||||
| Dates: |
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| Volume: | 75 | ||||
| Number: | 11 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | pp. 1638-1645 | ||||
| DOI: | 10.1016/j.radphyschem.2005.07.034 | ||||
| Publication Status: | Published | ||||
| Title of Event: | 20th International Conference on X-Ray and Inner-Shell Processes | ||||
| Location of Event: | Univ Melbourne, Melbourne, AUSTRALIA | ||||
| Date(s) of Event: | JUL 04-08, 2005 |
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