Please use this identifier to cite or link to this item:
|Title:||Multipolar, Magnetic and Vibrational Lattice Dynamics in the Low Temperature Phase of Uranium Dioxide|
|Authors:||CACIUFFO Roberto; SANTINI P.; CARRETTA S.; AMORETTI G.; HIESS A.; MAGNANI Nicola; REGNAULT L.-P.; LANDER G.h.|
|Citation:||PHYSICAL REVIEW B vol. 84 no. 10 p. 104409 (1-10)|
|Publisher:||AMER PHYSICAL SOC|
|Type:||Articles in periodicals and books|
|Abstract:||We report the results of inelastic neutron scattering experiments performed with triple-axis spectrometers to investigate the low-temperature collective dynamics in the ordered phase of uranium dioxide. The results are in excellent agreement with the predictions of mean-field RPA calculations emphasizing the importance of multipolar superexchange interactions. By comparing neutron scattering intensities in dfferent polarization channels and at equivalent points in different Brillouin zones, we show the mixed magnetovibrational-quadrupolar character of the observed excitations. The high-energy resolution afforded by the cold triple-axis spectrometer allowed us to study in detail the magnon-phonon interaction giving rise to avoided crossings along the [00ζ] reciprocal space direction.|
|JRC Institute:||Institute for Transuranium Elements|
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.