UNSPECIFIED. (2000) High-magnetic-field behavior of the triangular-lattice antiferromagnet CuFeO2. PHYSICAL REVIEW B, 62 (13). pp. 8983-8988. ISSN 0163-1829

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Abstract

The high-magnetic-field behavior of the triangular-lattice antiferromagnet CuFeO2 is studied using single crystal neutron diffraction measurements in a field of up to 14.5 T and also by magnetization measurements in a field of up to 12 T. At low temperature, two well-defined first order magnetic phase transitions are found in this range of applied magnetic field (H parallel to c): at H-c1=7.6(3)/7.1(3) T and H-c2=13.2(1)/12.7(1) T when ramping the field up/down. In a field above H-c2 the magnetic Bragg peaks show unusual history dependence. In zero field T-N1 = 14.2(1) K separates a high-temperature paramagnetic and an intermediate incommensurate structure, while T-N2 = 11.1(3) K divides an incommensurate phase from the low-temperature four-sublattice ground state. The ordering temperature T-N1 is found to be almost field independent, while T-N2 decreases noticeably in applied field. The magnetic phase diagram is discussed in terms of the interactions between an applied magnetic field and the highly frustrated magnetic structure of CuFeO2.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICAL REVIEW B
Publisher:	AMERICAN PHYSICAL SOC
ISSN:	0163-1829
Official Date:	1 October 2000
Dates:	Date Event 1 October 2000 UNSPECIFIED
Volume:	62
Number:	13
Number of Pages:	6
Page Range:	pp. 8983-8988
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/12880

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