2009/02/25 by A. Pimenov, A. Shuvaev, A. Loidl +5 · 1 citation
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Antiferromagnetism #Atomic physics #Condensed matter physics #Dielectric #Excited state #Ferroelectricity #Magnetic and transport properties of perovskites and related materials #Magnetic field #Multiferroics #Multiferroics and related materials #Physics #Quantum mechanics #Underwater Acoustics Research #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.102.107203
published as Phys. Rev. Lett. 102, 107203 (2009) · 5 Pages, 4 figures
arxiv created 2009/02/25 · openalex publication_date 2009/03/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Magnetic and magnetoelectric excitations in the multiferroic TbMnO3 have been investigated at terahertz frequencies. Using different experimental geometries we can clearly separate the electroactive excitations (electromagnons) from the magnetoactive modes, i.e., antiferromagnetic resonances. Two antiferromagnetic resonances were found to coincide with electromagnons. This indicates that both excitations belong to the same mode and the electromagnons can be excited by a magnetic ac field as well. In spite of the 90 degrees rotation of the magnetic cycloid in external magnetic fields, the electromagnons are observable for electric ac fields parallel to the a axis only.