Title: Measurements related to the magnetism of curium metal
Authors: LANDER G. H.GRIVEAU JEAN-CHRISTOPHEELOIRDI RACHELMAGNANI NICOLACOLINEAU ERICWILHELM F.BROWN S. D.WERMEILLE DIDIERROGALEV A.HAIRE R.CACIUFFO ROBERTO
Citation: PHYSICAL REVIEW B vol. 99 no. 22 p. 224419
Publisher: AMER PHYSICAL SOC
Publication Year: 2019
JRC N°: JRC115985
ISSN: 2469-9950 (online)
URI: https://doi.org/10.1103/PhysRevB.99.224419
http://publications.jrc.ec.europa.eu/repository/handle/JRC115985
DOI: 10.1103/PhysRevB.99.224419
Type: Articles in periodicals and books
Abstract: We report a series of measurements on a <1 mg sample of 248Cm metal. Magnetization measurements are similar to those reported earlier. X-ray absorption and magnetic circular dichroism (XMCD) measurements at the ESRF synchrotron at the M4,5 absorption edges show that the element has an orbital moment of ∼6% of the spin moment, and the two are parallel. This confirms the predictions of intermediate coupling, which has been suggested for Cm by other spectroscopies. In an XMCD measurement 2.5 years later, a field of 17 T was found to induce a larger induced signal (by a factor of ∼2) than that found earlier, indicating a change in the sample. We attribute this to the gradual loss of crystallinity with time since preparation, as a result of the damaged caused by fragments from the spontaneous fission within the sample itself. The final measurements aimed to determine the antiferromagnetic structure with resonant x rays were unable to observe any diffraction peaks from the sample. The ground-state antiferromagnetic structure remains unresolved.
JRC Directorate:Nuclear Safety and Security

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.