Magnetic Interaction in the Geometrically Frustrated Triangular LatticeAntiferromagnet CuFeO2

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.99.157201· OSTI ID:1001705

Ye, Feng ^[1]; Fernandez-Baca, Jaime A ^[1]; Fishman, Randy Scott ^[1]; Ren, Y. ^[2]; Kang, H. J. ^[3]; Qiu, Y. ^[3]; Kimura, T. ^[4]

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1. ORNL
2. Argonne National Laboratory (ANL)
3. National Institute of Standards and Technology (NIST)
4. Los Alamos National Laboratory (LANL)

The spin wave excitations of the geometrically frustrated triangular lattice antiferromagnet (TLA) 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 deeps in the spin wave dispersion occur at the incommensurate wavevectors associated with multiferroic phase, and can be interpreted as dynamic precursors to the magnetoelectric behavior in this system.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Flux Isotope Reactor
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1001705
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 99; ISSN 1079-7114; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DISPERSION RELATIONS
NEUTRONS
RESOLUTION
SCATTERING
SPIN WAVES