Journal of Applied Physics
The weak dissipation of spin waves in magnetic materials make antiferromagnets realistic condensed matter systems for the experimental observation of intrinsic localized modes of nanoscale size. By employing a chirped high power microwave pulse, a few microseconds long, the lowest frequency antiferromagnetic uniform mode of the quasi-one-dimensional biaxial antiferromagnet (C2 H5 NH3 )2 CuCl4. has been efficiently driven into an unstable dynamical region. Intrinsic localized spin waves form below the gap. Our experimental findings demonstrate that a simple optimal control scheme can be used to investigate this kind of nonlinear excitation.
English, L.Q., M. Sato, and A.J. Sievers. "Nanoscale Intrinsic Localized Modes in an Antiferromagnetic Lattice." Journal of Applied Physics 89, no. 11 (2001): 6707-6709. http://aip.scitation.org/doi/abs/10.1063/1.1362639