Transition to chaotic state in spin-wave turbulence

Michinobu Mino, S. Mitsudo, H. Yamazaki, K. Nakamura

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Abstract

Parametric excitation of spin-waves in an yttrium iron garnet is studied within the coincidence regime of the first-order Suhl instability. Above the spin-wave instability threshold, a period-doubling cascade is observed. At this onset of chaos, the singularity spectrum f(α) is obtained. Experiments are performed at a pumping frequency of 3.3 GHz and at a temperature of 4.2 K. A sphere of an yttrium iron garnet (YIG) is wound with a driving coil and a pick-up coil, which are perpendicular with each other in the x-y plane. The static magnetic field, which is applied parallel to the [111] direction of YIG, are directed along the z-axis. Oscillations of the sample magnetization are detected as the induced voltage V(t) in the pick-up coil. The measurements are done in a field of 1308 Oe.

Original languageEnglish
Pages (from-to)781-782
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume90 pt 91
Publication statusPublished - 1990

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ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Mino, M., Mitsudo, S., Yamazaki, H., & Nakamura, K. (1990). Transition to chaotic state in spin-wave turbulence. Journal of Magnetism and Magnetic Materials, 90 pt 91, 781-782.