Magnetic exchange interaction between rare-earth and Mn ions in multiferroic hexagonal manganites.
We report a study of magnetic dynamics in multiferroic hexagonal manganite HoMnO3 by far-infrared spectroscopy. The low-temperature magnetic excitation spectrum of HoMnO3 consists of magnetic-dipole transitions of Ho ions within the crystal-field split J = 8 manifold and of the triangular antiferromagnetic resonance of Mn ions. We determine the effective spin Hamiltonian for the Ho ion ground state. The magnetic-field splitting of the Mn antiferromagnetic resonance allows us to measure the magnetic exchange coupling between the rare-earth and Mn ions.
Talbayev
D
D
Center for Integrated Nanotechnologies, MS K771, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. diyar@lanl.gov
LaForge
A D
AD
Trugman
S A
SA
Hur
N
N
Taylor
A J
AJ
Averitt
R D
RD
Basov
D N
DN