Noncollinear magnetic phases of a triangular-lattice antiferromagnet and of doped CuFeO2

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Physical Review B

OSTI ID:1009932

Fishman, Randy Scott ^[1]; Okamoto, Satoshi ^[1]

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1. ORNL

We obtain the noncollinear ground states of a triangular-lattice antiferromagnet with exchange interactions up to third nearest neighbors as a function of the single-ion anisotropy D. At a critical value of D, the collinear phase transforms into a complex noncollinear phase with odd-order harmonics of the fundamental ordering wavevector Q. The observed elastic peaks at 2 x Q in both Al- and Ga-doped CuFeO2 are explained by a scalene distortion of the triangular-lattice produced by the repulsion of neighboring oxygen atoms.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1009932
• Journal Information: Physical Review B, Vol. 81, Issue 2; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
ANTIFERROMAGNETIC MATERIALS
ATOMS
COPPER
DOPED MATERIALS
EXCHANGE INTERACTIONS
FERRITE
GROUND STATES
HARMONICS
OXYGEN