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High-temperature magnetic correlations in the 2D S=1/2 antiferromagnet copper formate tetradeuterate

Ronnow, HM; McMorrow, DF; Harrison, A; (1999) High-temperature magnetic correlations in the 2D S=1/2 antiferromagnet copper formate tetradeuterate. PHYS REV LETT , 82 (15) 3152 - 3155.

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Abstract

The temperature dependence of the structure factor S(k) of the instantaneous magnetic fluctuations in copper formate tetradeuterate has been investigated using neutron scattering techniques. Our data extend to unprecedently high temperatures (T similar to J) compared to the 2D exchange coupling. The correlation length xi and amplitude S-0 are in good agreement with the predictions for a 2D S = 1/2 Heisenberg antiferromagnet on a square lattice.

Type: Article
Title: High-temperature magnetic correlations in the 2D S=1/2 antiferromagnet copper formate tetradeuterate
Keywords: QUANTUM HEISENBERG-ANTIFERROMAGNET, SQUARE-LATTICE, CORRELATION LENGTH, LA2CUO4, SCATTERING
UCL classification: UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Maths and Physical Sciences
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/79549
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