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Title: Magnetic Interactions in the Geometrically Frustrated Triangular Lattice Antiferromagnet CuFeO2

Abstract

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 0:44 and J3=J1 0:57), as well as out-of-plane coupling (Jz, with Jz=J1 0:29) 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.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4]
  1. ORNL
  2. Argonne National Laboratory (ANL)
  3. National Institute of Standards and Technology (NIST)
  4. Osaka University
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); High Flux Isotope Reactor
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
941607
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 99; Journal Issue: 157201
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DISPERSION RELATIONS; NEUTRONS; RESOLUTION; SCATTERING; VECTORS

Citation Formats

Ye, Feng, Fernandez-Baca, Jaime A, Fishman, Randy Scott, Ren, Y., Qiu, Y., and Kimura, T. Magnetic Interactions in the Geometrically Frustrated Triangular Lattice Antiferromagnet CuFeO2. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.99.157201.
Ye, Feng, Fernandez-Baca, Jaime A, Fishman, Randy Scott, Ren, Y., Qiu, Y., & Kimura, T. Magnetic Interactions in the Geometrically Frustrated Triangular Lattice Antiferromagnet CuFeO2. United States. doi:10.1103/PhysRevLett.99.157201.
Ye, Feng, Fernandez-Baca, Jaime A, Fishman, Randy Scott, Ren, Y., Qiu, Y., and Kimura, T. Mon . "Magnetic Interactions in the Geometrically Frustrated Triangular Lattice Antiferromagnet CuFeO2". United States. doi:10.1103/PhysRevLett.99.157201.
@article{osti_941607,
title = {Magnetic Interactions in the Geometrically Frustrated Triangular Lattice Antiferromagnet CuFeO2},
author = {Ye, Feng and Fernandez-Baca, Jaime A and Fishman, Randy Scott and Ren, Y. and Qiu, Y. and Kimura, T.},
abstractNote = {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 0:44 and J3=J1 0:57), as well as out-of-plane coupling (Jz, with Jz=J1 0:29) 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.},
doi = {10.1103/PhysRevLett.99.157201},
journal = {Physical Review Letters},
number = 157201,
volume = 99,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}