Title :
Terahertz frequency electromagnon and magnon modes in multiferroic cupric oxide
Author :
Jones, Samuel P. P. ; Gaw, S. ; Prabhakaran, D. ; Boothroyd, A.T. ; Lloyd-Hughes, James
Author_Institution :
Dept. of Phys., Univ. of Oxford, Oxford, UK
Abstract :
We examined the terahertz magnetoelectric response of cupric oxide, a high-temperature multiferroic with a cycloidal spin structure that induces an electrical polarisation. Terahertz time-domain spectroscopy at various temperatures and magnetic fields uncovered electromagnon and magnon modes, providing insights into the spin Hamiltonian.
Keywords :
antiferromagnetic materials; copper compounds; dielectric polarisation; ferroelectric materials; ferroelectricity; magnetic structure; magnetoelectric effects; magnons; multiferroics; spin Hamiltonians; terahertz wave spectra; CuO; antiferromagnetic phase; cycloidal spin structure; electrical polarisation; ferroelectricity; high-temperature multiferroic; magnetic fields; magnetoelectric response; multiferroic cupric oxide; spin Hamiltonian; terahertz frequency electromagnon modes; terahertz frequency magnon modes; terahertz time-domain spectroscopy; Magnetic resonance; Magnetic switching; Magnetoelectric effects; Perpendicular magnetic anisotropy; Spectroscopy; Time-domain analysis;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665915
