17O NMR study in (Pu0.91Am0.09)O2

Tokunaga, Y.; Osaka, Masahiko; Kambe, S.; Miwa, Shuhei; Sakai, Hironori; Chudo, Hiroyuki; Homma, Yoshiya; Shiokawa, Y.

doi:10.1016/j.jnucmat.2009.10.062

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A Magnetic Structure Of Amo1

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Cited by 3 publications

(1 citation statement)

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“…In fact, we observe the oxygen sublattice distortion of roughly 0.17 Å along the crystallographic directions 111 . Our result confirms the observations made by Tokunaga et al [42]. Indeed, from the frequency curve with respect to temperature, they observe a NMR line broadening and they suppose that this NMR line broadening could arise from oxygen sublattice distortions.…”

Section: A Magnetic Structure Of Amosupporting

confidence: 93%

First-principles investigation of the bulk properties of americium dioxide and sesquioxides

Noutack

Geneste

Jomard

et al. 2019

Phys. Rev. Materials

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Section: A Magnetic Structure Of Amosupporting

confidence: 93%

First-principles investigation of the bulk properties of americium dioxide and sesquioxides

Noutack

Geneste

Jomard

et al. 2019

Phys. Rev. Materials

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DFT+U study of the structures and properties of the actinide dioxides

Pegg

Aparicio-Anglès

Storr

et al. 2017

Journal of Nuclear Materials

100

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Solid-State NMR Study on Actinide Dioxides

et al. 2012

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Besides the importance of the actinide dioxide series as a nuclear fuel, the magnetic properties of these compounds at low temperatures are particularly interesting. Their surprisingly varied physical properties at low temperatures stimulate continuing interest for both theory and experiment. Recently, we have performed 17O-NMR studies for the first time on Pu and Amcontaining dioxide systems, (Pu1-xAmx)O2. For the x=0.09 sample, a temperature-dependent NMR line broadening has been observed at low temperatures. By comparing the experimental data with the results of NMR line simulations, we have estimated the effective moment of Am ions to be Peff=1.38 μB. The value suggests the 5f5 (Am4+) state of the Am ion in PuO2. For the x=1 (=AmO2) sample, on the other hand, our 17O-NMR data provide the first microscopic evidence for a phase transition at 8.5 K as a bulk property in this system. A spectrum with a triangular line shape indicates that the internal field is distributed very nearly randomly in the ordered state.

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17O NMR study in (Pu0.91Am0.09)O2

Cited by 3 publications

References 26 publications

First-principles investigation of the bulk properties of americium dioxide and sesquioxides

First-principles investigation of the bulk properties of americium dioxide and sesquioxides

DFT+U study of the structures and properties of the actinide dioxides

Solid-State NMR Study on Actinide Dioxides

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