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Generation, dynamics, and collisions of bending waves at domain boundaries in yttrium orthoferrite

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Abstract

Solitary bending waves have been observed on domain boundaries of Néel type in wafers of yttrium orthoferrite, having a very sharp leading edge and an extended trailing edge and offset as a whole from the domain boundary and moving with high speeds close to the limiting velocity. Head-on collisions of two such waves of the same amplitude lead to their complete annihilation. Analogous collisions of two such waves, but of different amplitudes, lead to the appearance of a wave with the difference amplitude moving in the same direction as the wave of larger amplitude. The solitary bending waves investigated in this study appear to move under the action of gyroscopic forces acting on magnetic vortices on domain boundaries in yttrium orthoferrite, analogous to vertical Bloch lines with departure of the magnetization vector from the ac plane. From equality of the gyroscopic force with the friction force acting on the leading edge of the solitary bending wave we have estimated the amplitudes of these waves and the magnitudes of the topological charges of the magnetic vortices.

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Authors and Affiliations

  1. Moscow State (M. V. Lomonosov) University, 119899, Moscow, Russia

    M. V. Chetkin, Yu. N. Kurbatova, A. I. Akhutkina & T. B. Shapaeva

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  1. M. V. Chetkin
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  2. Yu. N. Kurbatova
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  3. A. I. Akhutkina
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  4. T. B. Shapaeva
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Additional information

Zh. Éksp. Teor. Fiz. 115, 2160–2169 (June 1999)

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Chetkin, M.V., Kurbatova, Y.N., Akhutkina, A.I. et al. Generation, dynamics, and collisions of bending waves at domain boundaries in yttrium orthoferrite. J. Exp. Theor. Phys. 88, 1179–1185 (1999). https://doi.org/10.1134/1.558908

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