Competition between exchange and anisotropy in a pyrochlore ferromagnet J. D. M. Champion, S. T. Bramwell, P. C. W. Holdsworth and M. J. Harris Europhys. Lett., 57 1 (2002) 93-99 Published online: 01 September 2002 DOI: 10.1209/epl/i2002-00546-1