Carl E. Patton

Learn More
Fermi-Pasta-Ulam recurrence through soliton dynamics has been realized. The experiment used a magnetic film strip-based active feedback ring. At some ring gain level, a wide spin wave pulse is self-generated in the ring. As the pulse circulates, it separates into two envelop solitons with different speeds. When the fast soliton catches up and collides with(More)
Keywords: Ferrites Spinel Garnet Hexaferrite Ferromagnetic resonance Pulsed laser deposition Liquid phase epitaxy Screen printing Negative index materials Microwave a b s t r a c t Next generation magnetic microwave devices will be planar, smaller, weigh less, and perform well beyond the present state-of-the-art. For this to become a reality advances in(More)
The random generation of coherent solitary waves from incoherent waves in a medium with an instantaneous nonlinearity has been observed. One excites a propagating incoherent spin wave packet in a magnetic film strip and observes the random appearance of solitary wave pulses. These pulses are as coherent as traditional solitary waves, but with random timing(More)
Magnetostatic backward volume spin-wave ͑SW͒ pulses have been cloned and trapped through the use of multiple, properly timed, parametric pumping ͑PP͒ pulses. The experiment was done with 30-ns-wide pulses at 5 GHz in a 7.1-␮m-thick yttrium iron garnet film. Well-timed, large-area, high-power, 2-ns-wide microwave pulses at 10 GHz were used to pump the SW(More)
The longitudinal magneto-optical Kerr effect is used to obtain a calibrated measure of the dynamic magnetization response over the ferromagnetic resonance (FMR) profile for in-plane magnetized Permalloy films excited with high power in-plane transverse microwave fields at 1.25 to 3.75 GHz and in-plane precession angles up to about 20 degrees. The data(More)
  • Glenn Ramer, E Wigen, +6 authors Ruth
  • 2014
a close associate during the four years at Caltech and for playing a key role in my being admitted to Caltech. Helpful assistance from, discussions and correspondence with P. acknowledged. In the course of the work, assistance from various Institute personnel has been indispensible and is acknowledged. Stratton for preparing the manuscript. Finally, I thank(More)
A precision microwave effective linewidth measurement technique for magnetic samples has been developed. The measurement utilizes a high-Q cylindrical cavity that contains the sample of interest, a highly stable and programable static magnetic field source, a computer controlled network analyzer for cavity center frequency omega c and quality factor Qc(More)
The manifestation of fractals in soliton dynamics has been observed for the first time. The experiment utilized self-generated spin-wave envelope solitons in a magnetic film based active feedback ring. At high ring gain, the soliton that circulates in the ring breathes in a fractal pattern. The corresponding power frequency spectrum shows a comb structure,(More)
The generation of dark spin wave envelope soliton trains from a continuous wave input signal due to spontaneous modulational instability has been observed for the first time. The dark soliton trains were formed from high dispersion dipole-exchange spin waves propagated in a thin yttrium iron garnet film with pinned surface spins at frequencies situated near(More)