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Magnetic field induced changes in the critical exponent β of the chiral triangular antiferromagnet CsMnBr3 in the presence of an electric field (abstract)

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4 Author(s)
Visser, D. ; Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom ; Monteith, A.R. ; Bargawi, A.Y. ; Zeiske, Th.

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The magnetic moments in the triangular antiferromagnetic CsMnBr3 order at TN=8.3 K with a frustration of the magnetic moments in a 120° type magnetic structure. The magnetic moments are either ordered in a clockwise or an anticlockwise direction resulting in a chirality ordering, which is characterized by the critical exponent of the magnetic sublattice magnetization β=0.25. It has been shown that an electric field applied along the [110] direction removes the chiral ordering and a linear Ising-like phase will be established; consequently, the value of β decreases. The subsequent application of a magnetic field of B=4 T along the [100] direction causes the critical exponent β to increase. The magnetic phase diagram of CsMnBr3 does not change due to the introduction of an electric field.© 1997 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:81 ,  Issue: 8 )

Date of Publication:

Apr 1997

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