Abstract
The FMR fine structure of the first-order Suhl instability in YIG spheres, previously observed by Jantz and Schneider (1975), has been re-investigated both for the conditions of coincidence and subsidiary absorption (3 and 9 GHz) from room temperature down to 1.6K. The observed fine structure consists of several series of closely spaced resonances, indicating a critical wave vectork≠0 even for half the pumping frequency lower than the 45° spin-wave branch, which is in contrast to the prediction of Suhl's theory. The spacing of these resonances was analyzed in terms of spherical modes. We were able to determine the indices and the effective wave numbers (≈105 cm−1) of the critical modes. The very different dynamic behaviour observed at room temperature and at 1.6K can be attributed to a competition of different damping mechanisms—mainly surface pit scattering and three-magnon confluence processes — and their dependences on field, frequency, and temperature.
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Suhl, H.: J. Phys. Chem. Solids1, 209 (1957)
Zakharov, V.E., L'vov, V.S., Starobinet, S.S.: Phys. Usp.17, 896 (1975)
Patton, C.E.: Phys. Rep.103, 251 (1984)
Waldner, F.: Phys. Rev. A31, 420 (1985)
Caroll, T.L., Pecora, L.M., Rachford, F.J.: Phys. Rev. Lett.50, 2891 (1987): Phys. Rev. B38, 2938 (1988)
Benner, H., Rödelsperger, F., Seitz, H., Wiese, G.: J. Phys. Colloque C8,49, 1603 (1988)
Bryant, P.H., Jeffries, C.D., Nakamura, K.: Phys. Rev. Lett.60, 1185 (1988); Phys. Rev. A38, 4223 (1988)
Smirnov, A.I.: Sov. Phys. JETP67, 969 (1988)
Zhang, X.Y., Suhl, H.: Phys. Rev. B38, 4893 (1988)
Yamazaki, H., Mino, M.: Prog. Theor. Phys. [Suppl.]98, 400 (1989)
Lim, S.P., Huber, D.L.: Phys. Rev. B41, 9283 (1990)
Wigen, P.E., McMichael, R.D., Jayaprakash, C.: J. Mag. Mat.84, 237 (1990)
Warden, M., Waldner, F.: J. Appl. Phys.64, 5386 (1988)
de Aguiar, F.M.: Phys. Rev. A40, 7244 (1989)
Caroll, T.L., Pecora, L.M., Rachford, F.J.: Phys. Rev. A40, 377 (1989);40, 2327 (1989);40, 4149 (1989)
Rezende, S.M., de Aguiar, F.M., Azevedo, A.: J. Appl. Phys.67, 5624 (1990)
Wiese, G., Benner, H.: Z. Phys. B79, 119 (1990)
Mitsudo, S., Mino, M., Yamazaki, H.: J. Phys. Soc. Jpn.50, 4231 (1990)
Jantz, W., Schneider, J.: Phys. Status Solidi (a)31, 595 (1975)
Wiese, G.: Z. Phys. B82, 453 (1991)
Wiese, G., Krug von Nidda, H.-A., Benner, H.: Europhys. Lett.15, 585 (1991)
Holstein, F., Primakov, H.: Phys. Rev.58, 1048 (1940)
Damon, R.W.: Ferromagnetic resonance at high power. In: Magnetism, Vol. 1, p. 551, Rado, G.T., Suhl, G. (eds.). New York: Academic Press 1963
Walker, L.R.: J. Appl. Phys.29, 318 (1958)
Krug von Nidda, H.A.: Diploma thesis, Darmstadt 1992
Sparks, M.: Ferromagnetic relaxation theory. New York: McGraw-Hill 1964
Bryant, P.H.: Phys. Rev. B39, 4363 (1989)
Chen, M., Patton, C.E.: J. Appl. Phys.69, 5724 (1991)
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Krug von Nidda, H.A., Wiese, G. & Benner, H. Fine structure and critical modes at the first-order Suhl instability in YIG spheres. Z. Physik B - Condensed Matter 95, 55–62 (1994). https://doi.org/10.1007/BF01316843
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DOI: https://doi.org/10.1007/BF01316843