Magnetostriction of the itinerant uniaxial ferromagnet Y2Fe14B

Magnetostriction measurements have been performed on a tetragonal Y2Fe14B single crystal along all the major symmetry directions at temperatures ranging from 10 to 400 K and applied magnetic. fields up to 14 T. The standard irreducible magnetostrictive modes for tetragonal symmetry, epsilon(alpha,1)(c), epsilon(alpha,2)(c), epsilon(alpha,1)(a), epsilon(alpha,2)(a), epsilon(1)(gamma)(a), and epsilon(epsilon)(d), have been obtained from the measurements. Their thermal and applied magnetic-field dependence are discussed. The isotropic volume striction modes have been observed to be one order of magnitude higher than the anisotropic ones. (C) 1997 American Institute of Physics.