Lattice and spin excitations in multiferroic h-YbMnO 3

J. Liu, C. Toulouse, P. Rovillain, M. Cazayous, Y. Gallais, M. A. Measson, N. Lee, Sang-Wook Cheong, A. Sacuto

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Lattice and spin excitations have been studied by Raman scattering in hexagonal YbMnO 3 single crystals. The temperature dependences of the phonon modes show that the E 2 mode at 256 cm -1 related to the displacement of Mn and O ions in a-b plane is coupled to the spin order. The A 1 phonon mode at 678 cm -1 presents a soft mode behavior at the Néel temperature. Connected to the motion of the apical oxygen ions along the c direction, this mode controls directly the Mn-Mn interactions between adjacent Mn planes and the superexchange path. Crystal field and magnon mode excitations have been identified. The temperature investigation of the spin excitations shows that the spin structure is strongly influenced by the Yb-Mn interaction. Under a magnetic field along the c axis, we have investigated the magnetic reordering and its impact on the spin excitations.

Original languageEnglish (US)
Article number184410
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number18
StatePublished - Nov 9 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Lattice and spin excitations in multiferroic h-YbMnO <sub>3</sub>'. Together they form a unique fingerprint.

Cite this