TY - JOUR
T1 - Magnetic interactions in the geometrically frustrated triangular lattice antiferromagnet CuFeO2
AU - Ye, F.
AU - Fernandez-Baca, J. A.
AU - Fishman, R. S.
AU - Ren, Y.
AU - Kang, H. J.
AU - Qiu, Y.
AU - Kimura, T.
PY - 2007/10/8
Y1 - 2007/10/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=35148847737&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.99.157201
DO - 10.1103/PhysRevLett.99.157201
M3 - Article
AN - SCOPUS:35148847737
SN - 0031-9007
VL - 99
JO - Physical Review Letters
JF - Physical Review Letters
IS - 15
M1 - 157201
ER -