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Magnetic Polarization of the Americium J=0 Ground State in AmFe2
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2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 114, no 9, article id 097203Article in journal (Refereed) Published
Abstract [en]

Trivalent americium has a nonmagnetic (J = 0) ground state arising from the cancellation of the orbital and spin moments. However, magnetism can be induced by a large molecular field if Am3+ is embedded in a ferromagnetic matrix. Using the technique of x-ray magnetic circular dichroism, we show that this is the case in AmFe2. Since < J(z)> = 0, the spin component is exactly twice as large as the orbital one, the total Am moment is opposite to that of Fe, and the magnetic dipole operator < T-z > can be determined directly; we discuss the progression of the latter across the actinide series.

Place, publisher, year, edition, pages
2015. Vol. 114, no 9, article id 097203
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Physical Sciences
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URN: urn:nbn:se:uu:diva-251810DOI: 10.1103/PhysRevLett.114.097203ISI: 000351288800010PubMedID: 25793847OAI: oai:DiVA.org:uu-251810DiVA, id: diva2:808236
Available from: 2015-04-27 Created: 2015-04-24 Last updated: 2017-12-04Bibliographically approved

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Rusz, JanOppeneer, Peter M.

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