Phys. Rev. Lett. 99, 157201 (2007) [4 pages]
Magnetic Interactions in the Geometrically Frustrated Triangular Lattice Antiferromagnet CuFeO2
Abstract
References (21)
Citing Articles
F. Ye, 1 J. A. Fernandez-Baca, 1,2 R. S. Fishman, 3 Y. Ren, 4 H. J. Kang, 5,6 Y. Qiu, 5,6 and T. Kimura71Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
2Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA
3Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
4Experimental Facilities Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
5NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
6Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA
7Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
Received 8 May 2007; published 8 October 2007
The spin-wave excitations of the geometrically frustrated triangular lattice antiferromagnet CuFeO2 have been measured using high resolution inelastic neutron scattering. Antiferromagnetic interactions up to third nearest neighbors in the ab plane (J1, J2, J3, with J2/J1![[approximate]](http://scitation.aip.org/stockgif3/ap.gif) 0.44 and J3/J10.57), as well as out-of-plane coupling (Jz, with Jz/J10.29) are required to describe the spin-wave dispersion relations, indicating a three-dimensional character of the magnetic interactions. Two energy dips in the spin-wave dispersion occur at the incommensurate wave vectors associated with multiferroic phase and can be interpreted as dynamic precursors to the magnetoelectric behavior in this system.
©2007 The American Physical Society
| URL: |
http://link.aps.org/doi/10.1103/PhysRevLett.99.157201
|
| DOI: |
10.1103/PhysRevLett.99.157201 |
| PACS: |
75.30.Ds;
61.12.-q;
75.50.Ee
|
REFERENCES (21)
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- T. Kimura, J. C. Lashley, and A. P. Ramirez, Phys. Rev. B 73, 220401(R) (2006).
- S. Seki et al., Phys. Rev. B 75, 100403(R) (2007).
- F. Ye et al., Phys. Rev. B 73, 220404(R) (2006).
- N. Terada et al., Phys. Rev. B 75, 224411 (2007).
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