Fishman RS. Phase diagram of a geometrically frustrated triangular-lattice antiferromagnet in a magnetic field.
PHYSICAL REVIEW LETTERS 2011;
106:037206. [PMID:
21405294 DOI:
10.1103/physrevlett.106.037206]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 01/03/2011] [Indexed: 05/30/2023]
Abstract
The magnetic phase diagram of a geometrically frustrated triangular-lattice antiferromagnet is evaluated as a function of magnetic field and anisotropy using a trial spin state built from harmonics of a fundamental ordering wave vector. A noncollinear incommensurate state, observed to be chiral and ferroelectric in CuFeO2, appears above a collinear state with 4 sublattices (SLs). The apparent absence of multiferroic behavior for predicted chiral, noncollinear 5-SL states poses a challenge to theories of the ferroelectric coupling in CuFeO2.
Collapse