Magnetism of Stripe-Ordered La_(5/3)Sr_(1/3)NiO_4
  ^139La nuclear magnetic resonance studies reveal markedly different magnetic properties of the two sites created by the charged domain wall formation in La_(5/3)Sr_(1/3)NiO_4. NMR is slow compared to neutron scattering; we observe a 30 K suppression in magnetic ordering temperature indicating glassy behavior. Applied magnetic field reorients the in-plane ordered moments with respect to the lattice, but the relative orientation of the spins amongst themselves is stiff and broadly distributed. 
Y. Yoshinari, P. C. Hammel (Los Alamos National Laboratory) and S-W.   Cheong (Lucent Technologies, Bell Laboratories)