New Insights about CuO Nanoparticles from Inelastic Neutron Scattering.

ABSTRACT: Inelastic Neutron Scattering (INS) spectroscopy has provided a unique insight into the magnetodymanics of nanoscale copper (II) oxide (CuO). We present evidence for the propagation of magnons in the directions of the ordering vectors of both the commensurate and helically modulated incommensurate antiferromagnetic phases of CuO. The temperature dependency of the magnon spin-wave intensity (in the accessible energy-range of the experiment) conforms to the Bose population of states at low temperatures (T ≤ 100 K), as expected for bosons, then intensity significantly increases, with maximum at about 225 K (close to T_N), and decreases at higher temperatures. The obtained results can be related to gradual softening of the dispersion curves of magnon spin-waves and decre

SUBMITTER: Spencer EC 

PROVIDER: S-EPMC6473763 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature