Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session M64: Local Structure and Orbital Physics in Dielectrics and Ferroics
11:15 AM–2:15 PM,
Wednesday, March 4, 2020
Room: Mile High Ballroom 4E
Sponsoring
Units:
DMP DCOMP
Chair: Sara Callori, California State University, San Bernardino
Abstract: M64.00001 : Neutron diffraction and inelastic neutron scattering in the magnetodielectric regime of Ce2O3*
Presenter:
Alexandra Cote
(University of Illinois at Urbana-Champaign)
Authors:
Alexandra Cote
(University of Illinois at Urbana-Champaign)
Astha Sethi
(University of Illinois at Urbana-Champaign)
Taras Kolodiazhnyi
(National Institute of Materials Science)
Jeffrey Lynn
(National Institute of Standards and Technology)
S. Lance Cooper
(University of Illinois at Urbana-Champaign)
Greg MacDougall
(University of Illinois at Urbana-Champaign)
Following up on these observations, we have performed a series of both neutron diffraction and inelastic scattering measurements on powders of Ce2O3. Our diffraction data allow us to comment on both the nature of the magnetically ordered state at low temperatures, and the variation in atomic structure as the material is varied through TN. Our inelastic measurements focus on the temperature dependence of crystal field and phonon excitations at the energies of reported vibronic modes. I will present these data in the context of existing literature, and give our conclusions about the nature of the AF ground state and spin-lattice coupling in this material.
*This work was sponsored by the National Science Foundation, under Grant No. DMR-1455264-CAR.
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