M-A Vachon et al 2006 New J. Phys. 8 222 doi:10.1088/1367-2630/8/10/222
133Cs NMR investigation of 2D frustrated Heisenberg antiferromagnet, Cs2CuCl4
Focus on Correlated Electrons, Magnetism and Superconductivity in High Magnetic FieldsM-A Vachon1, W Kundhikanjana1, A Straub1, V F Mitrović1, A P Reyes2, P Kuhns2, R Coldea3 and Z Tylczynski4
Show affiliationsPart of Focus on Correlated Electrons, Magnetism and Superconductivity in High Magnetic Fields
We report 133Cs nuclear magnetic resonance (NMR) measurements on the 2D frustrated Heisenberg antiferromagnet Cs2CuCl4 down to 2 K and up to 15 T. We show that 133Cs NMR is a good probe of the magnetic degrees of freedom in this material. Cu spin degrees of freedom are sensed through a strong anisotropic hyperfine coupling. The spin excitation gap opens above the critical saturation field. The gap value was determined from the activation energy of the nuclear spin-lattice relaxation rate in a magnetic field applied parallel to the Cu chains (
axis). The values of the g-factor and the saturation field are consistent with the neutron-scattering and magnetization results. The measurements of the spin–spin relaxation time are exploited to show that no structural changes occur down to the lowest temperatures investigated.
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Issue 10 (October 2006)
Received 17 June 2006
Published 3 October 2006
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133Cs NMR investigation of 2D frustrated Heisenberg antiferromagnet, Cs2CuCl4
M-A Vachon et al 2006 New J. Phys. 8 222
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