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Inelastic polarised neutron scattering in the triangular-lattice antiferromagnet CsMnBr3: An experimental proof of the chiral universality

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UNSPECIFIED (1999) Inelastic polarised neutron scattering in the triangular-lattice antiferromagnet CsMnBr3: An experimental proof of the chiral universality. EUROPHYSICS LETTERS, 48 (2). pp. 215-220. ISSN 0295-5075.

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Abstract

The temperature behaviour of the polarisation-dependent part of the differential cross-section of inelastic neutron scattering is investigated for the triangular-lattice antiferromagnet CsMnBr3 in the critical region above T-N with the external magnetic field H = 4 T, applied along the hexagonal axis c, or the scattering vector Q(1/3 1/3 1). In the range of reduced temperature tau > 0.1 restricted by the resolution, this part of the cross-section, which is determined by the projection of a chiral fluctuation on the field-induced magnetisation, follows a power law of reduced temperature with the critical chiral crossover exponent phi(C) = 1.29(7). This is the first chiral critical exponent determined experimentally, which gives a direct proof of the chiral universality.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: EUROPHYSICS LETTERS
Publisher: E D P SCIENCES
ISSN: 0295-5075
Official Date: October 1999
Dates:
DateEvent
October 1999UNSPECIFIED
Volume: 48
Number: 2
Number of Pages: 6
Page Range: pp. 215-220
Publication Status: Published

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