Oxide power reactor fuels

Wang, Lian C.; Kaye, M.H.

doi:10.1016/b978-0-08-102571-0.00005-7

Advances in Nuclear Fuel Chemistry 2020

DOI: 10.1016/b978-0-08-102571-0.00005-7

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Oxide power reactor fuels

Lian C. Wang

M.H. Kaye

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Magnetoelastic standing waves induced in UO ₂ by microsecond magnetic field pulses

Schönemann

Rodriguez

Rickel

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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Magnetoelastic dilatometry of the piezomagnetic antiferromagnet UO2 was performed via the fiber Bragg grating method in magnetic fields up to 150 T generated by a single-turn coil setup. We show that in microsecond timescales, pulsed-magnetic fields excite mechanical resonances at temperatures ranging from 10 to 300 K, in the paramagnetic as well as within the robust antiferromagnetic state of the material. These resonances, which are barely attenuated within the 100-µs observation window, are attributed to the strong magnetoelastic coupling in UO2 combined with the high crystalline quality of the single crystal samples. They compare well with mechanical resonances obtained by a resonant ultrasound technique and superimpose on the known nonmonotonic magnetostriction background. A clear phase shift of π in the lattice oscillations is observed in the antiferromagnetic state when the magnetic field overcomes the piezomagnetic switch field Hc=−18 T. We present a theoretical argument that explains this unexpected behavior as a result of the reversal of the antiferromagnetic order parameter at Hc.

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Magnetoelastic standing waves induced in UO ₂ by microsecond magnetic field pulses

Schönemann

Rodriguez

Rickel

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

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Oxide power reactor fuels

Cited by 1 publication

References 62 publications

Magnetoelastic standing waves induced in UO ₂ by microsecond magnetic field pulses

Magnetoelastic standing waves induced in UO ₂ by microsecond magnetic field pulses

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Oxide power reactor fuels

Cited by 1 publication

References 62 publications

Magnetoelastic standing waves induced in UO 2 by microsecond magnetic field pulses

Magnetoelastic standing waves induced in UO 2 by microsecond magnetic field pulses

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Magnetoelastic standing waves induced in UO ₂ by microsecond magnetic field pulses

Magnetoelastic standing waves induced in UO ₂ by microsecond magnetic field pulses