Scientific article
Open access

Phonon anomalies versus magnetic ordering in CuO

Published inPhysica. B, Condensed matter, vol. 284-288, p. 1396-1397
Publication date2000-07

We report the "rst measurements of FIR and MIR re#ectivity of single-crystal monoclinic antiferromagnetic copper monoxide (CuO) in a wide temperature range (7}300 K) when b-axis and ac-plane polarized modes are completely separated and excited in transverse geometry. Previously reported softening of the A# # mode at the NeH el transition is con"rmed and found to be up to two times more signi"cant (about 10%). For the "rst time an emergence of several new IR-active lines at low temperatures is observed. The highest frequency new mode at 690 cm## strongly hardens and strengthens with cooling. The data are discussed in terms of strong spin}phonon coupling and possible charge disproportionation at low . # 2000 Elsevier Science B.V. All rights reserved. Keywords: Charge disproportionation; Infrared spectroscopy; Magnetic ordering; Spin}phonon interaction 1.

Affiliation Not a UNIGE publication
Citation (ISO format)
KUZMENKO, Alexey et al. Phonon anomalies versus magnetic ordering in CuO. In: Physica. B, Condensed matter, 2000, vol. 284-288, p. 1396–1397. doi: 10.1016/S0921-4526(99)02557-0
Main files (1)
Article (Published version)
ISSN of the journal0921-4526

Technical informations

Creation01/26/2022 2:19:00 PM
First validation01/26/2022 2:19:00 PM
Update time03/16/2023 2:30:44 AM
Status update03/16/2023 2:30:43 AM
Last indexation05/06/2024 8:58:00 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack