MAGNETOELASTIC EFFECTS IN ND2CUO4 SINGLE-CRYSTALS

We have measured the anisotropy of the spill reorientation fields in N d2CuO4 single crystals from the magnetoelastic effects. For T>1.5K our experimental data can be understood it terms of the four-sublattice a ntiferromagnet model and allow to estimate the relation between the ph enomenological constants of the model. For T<1.5K rye have found a man ifestation of new spin-reorientation field stimulated phase transition . These transitions exist only in narrow range of the angles between t he magnetic field and [100] directions and are connected most likely w ith the Nd spins.