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High-magnetic-field behavior of the triangular-lattice antiferromagnet CuFeO2
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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 | ||||
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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: |
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Volume: | 62 | ||||
Number: | 13 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 8983-8988 | ||||
Publication Status: | Published |
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