V.G.Karnaukhov, Yu.I.Lelyukh Forced vibration and dissipative heating of ferromagnetic layer |
Acoustic bulletin, Vol. 2 ¹ 2, (1999) |
| The problem on forced vibrations and dissipative heating of saturated ferromagnetic layer is studied. The interaction exchange, gyromagnetic and dissipative effects are taken into account. The conception of complex characteristics was used for modeling of dissipation. Dissipative function in the equation of energy is equal to magnetoelastic power averaged per cycle. The two cases of saturated magnetization are considered: when the magnetization direction coincides with the thickness direction, and when the magnetization direction is normal to the thickness. For the case of negligible interaction exchange the analytical solutions of mentioned problems were obtained. A simple expression is introduced for temperature of heating. For critical parameter of loading that one is accepted, at which the temperature rises to Kuri's point. By numerical simulation there were obtained the amplitude and temperature-frequency characteristics for the above problems. The estimate of influence of gyromagnetic effect on these characteristics is given. |
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KEY WORDS: ferromagnetic layer, forced vibraton³, heterogeneous exchange, gyromagnetic effects, dissipation |
| TEXT LANGUAGE: Russian |