Magnetic Exchange Interaction between Rare-Earth and Mn Ions in Multiferroic Hexagonal Manganites

被引:36
|
作者
Talbayev, D. [1 ]
LaForge, A. D. [2 ]
Trugman, S. A. [1 ]
Hur, N. [3 ]
Taylor, A. J. [1 ]
Averitt, R. D. [1 ,4 ]
Basov, D. N. [2 ]
机构
[1] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA
[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[3] Inha Univ, Dept Phys, Inchon 402751, South Korea
[4] Boston Univ, Dept Phys, Boston, MA 02215 USA
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevLett.101.247601
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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.
引用
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页数:4
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