Backward-volume-wave microwave-envelope solitons in yttrium iron garnet films.

摘要: Microwave-magnetic-envelope (MME) solitons generated from nonlinear magnetostatic-backward-volume wave packets have been observed in magnetic thin films. The MME signals were excited by 5--50-ns wide microwave pulses at 5.8 GHz a 15-mm-long 2.5-mm-wide, 7.2-\ensuremath{\mu}m-thick single-crystal yttrium iron garnet (YIG) film strip magnetized plane and parallel to the long side of strip. propagated static field. launched propagating pulse detected with planar microstrip transducers 4 mm apart. Envelope soliton behavior was evident time-resolved forms for various input power width combinations. At low levels, one sees relatively broad output which scales peak increases linearly power. As is increased above some threshold 0.5--1-W range, show narrowing steepening characteristic microwave-magnetic-envelope solitons. Further produce multiple-peak profiles, multiple generation. experimental results are consistent times linear propagation formation. However, numerical modeling based on form Schr\"odinger equation initial conditions parameters match experiments yields calculated profiles effects but do not quantitatively results.