Importance of stacking to the collinear magnetic phases of the geometrically frustrated antiferromagnet CuFeO₂

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R. S. Fishman,¹ F. Ye,² J. A. Fernandez-Baca,^2,3 J. T. Haraldsen,¹ and T. Kimura⁴
¹Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
²Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
³Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37831, USA
⁴Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyanaka, Osaka, 560-8531, Japan

Received 21 August 2008; published 28 October 2008

Thecorrect stacking of hexagonal layers is used to obtain accurateestimates for the exchange and anisotropy parameters of the geometricallyfrustrated antiferromagnet CuFeO₂. Those parameters are highly constrained by thestability of a collinear metamagnetic phase between fields of 13.5and 20 T. Constrained fits of the spin-wave frequencies ofthe collinear [up-arrow] [down-arrow] phase below 7 T are used toidentify the magnetic unit cell of the metamagnetic phase,which contains two hexagonal layers and 10 Fe³⁺ spins.

URL:	http://link.aps.org/doi/10.1103/PhysRevB.78.140407
DOI:	10.1103/PhysRevB.78.140407
PACS:	75.30.Ds; 75.50.Ee; 61.05.fg 75.30.Ds Spin waves in magnetically ordered materials 75.50.Ee Antiferromagnetics 61.05.fg Neutron scattering (condensed matter structure determination) YEAR: 2008
KEYWORDS:	antiferromagnetic materials, copper compounds, exchange interactions (electron), frustration, magnetic anisotropy, magnetic structure, metamagnetism, spin waves

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