Magnetic structure and domain conversion of quasi-2D frustrated antiferromagnet CuCrO2 probed by NMR

Abstract

We have carried out 63,65Cu NMR spectra measurements in magnetic field up to about 15.5 T on single crystal of a multiferroic triangular-lattice antiferromagnet CuCrO2. The measurements were performed for perpendicular and parallel orientation of the magnetic field with respect to the c-axis of the crystal, and the detailed angle dependence of the spectra on the magnetic field direction within ab-plane was studied. The shape of the spectra can be well described in the model of spiral spin structure proposed by recent neutron diffraction experiments. When field is rotated perpendicular to crystal c-axis, we observed, directly for the first time, a remarkable reorientation of spin plane simultaneous with rotation of the incommensurate wavevector by quantitatively deducing the conversion of less energetically favorable domain to a more favorable one. At high enough fields parallel to c-axis, the data are consistent with either a field-induced commensurate spiral magnetic structure or an incommensurate spiral magnetic structure with a disorder in the c direction, suggesting that high fields may have influence on interplanar ordering.

arXiv comment8 pages, 10 figures

References in corpus (5)

• Spin-driven ferroelectricity and possible antiferroelectricity in triangular lattice antiferromagnets ACrO2 (A = Cu, Ag, Li, or Na)
• Direct transition from a disordered to a multiferroic phase on a triangular lattice
• Spin dynamics in the geometrically frustrated multiferroic CuCrO2
• High magnetic field evolution of ferroelectricity in CuCrO2
• ESR of the quasi-two-dimensional antiferromagnet with a triangular lattice CuCrO2

Cited by in corpus (4)

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• Magnetic frustration and spontaneous rotational symmetry breaking in PdCrO2
• Search for a nematic phase in quasi-2D antiferromagnet CuCrO2 by NMR in electric field
• Magnetic properties of LiCu${}_3$O${}_3$ -- quasi-two-dimensional antiferromagnet on depleted square lattice