The Nd-langasite compound contains planes of magnetic Nd3+ ions on a lattice topologically equivalent to a kagom\'{e} net. The magnetic susceptibility does not reveal any signature of long-range ordering down to 2 K but rather a correlated paramagnetism with significant antiferromagnetic interactions between the Nd and a single-ion anisotropy due to crystal field effect. Inelastic neutron scattering on Nd-langasite powder and single-crystal allowed to probe its very peculiar low temperature dynamical magnetic correlations. They present unusual dispersive features and are broadly localized in wave-vector Q revealing a structure factor associated to characteristics short range-correlations between the magnetic atoms. From comparison with theoretical calculations, these results are interpreted as a possible experimental observation of a spin liquid state in an anisotropic kagom\'{e} antiferromagnet.
@article{arxiv.cond-mat/0605282,
title = {Magnetic excitations in a new anisotropic Kagom\'{e} antiferromagnet},
author = {Julien Robert and Virginie Simonet and Benjamin Canals and Rafik Ballou and Pierre Bordet and Isabelle Gelard and Alain Ibanez and Pascal Lejay and Jacques Ollivier and Anne Stunault},
journal= {arXiv preprint arXiv:cond-mat/0605282},
year = {2009}
}