Magnetic structure of CuCrO2: a single crystal neutron diffraction study

Details Magnetic structure of CuCrO2: a single crystal neutron diffraction study Magnetic structure of CuCrO2: a single crystal neutron diffraction study

2011-09-08

arxiv.org/abs/1109.1747v1

J. Phys.: Condens. Matter 24 (2012) 016004

Physics

Condensed Matter

Materials Science

Scientific paper

This paper presents results of a recent study of multiferroic \CCO\ by means of single crystal neutron diffraction. This system has two close magnetic phase transitions at $T\nsub{N1}=24.2$ K and $T\nsub{N2}=23.6$ K. The low temperature magnetic structure below $T\nsub{N2}$ is unambiguously determined to be a fully 3-dimensional proper screw. Between $T\nsub{N1}$ and $T\nsub{N2}$ antiferromagnetic order is found that is essentially 2-dimensional. In this narrow temperature range, magnetic near neighbor correlations are still long range in the ($H,K$) plane, whereas nearest neighbors along the $L$-direction are uncorrelated. Thus, the multiferroic state is realized only in the low-temperature 3-dimensional state and not in the 2-dimensional state.

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