Long-time relaxation of an ordered magnetic structure |
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| Authors: | S K Godovikov Yu D Perfil’ev Yu F Popov A I Firov |
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| Institution: | (1) Nuclear Physics Scientific-Research Institute, M. V. Lomonosov Moscow State University, 119899 Moscow, Russia;(2) M. V. Lomonosov Moscow State University, 119899 Moscow, Russia;(3) A. A. Baikov Institute of Metallurgy, Russian Academy of Sciences, 117911 Moscow, Russia |
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| Abstract: | In a Mössbauer investigation of the parameters of the hyperfine interactions on Fe57 nuclei in the ferromagnetic Tb0.8Y0.2Fe2, we have made the first observation of long-time (days, months) relaxation of an ordered magnetic structure. In this effect the orientation of some moments in a sample changes under the action of a pulsed magnetic field (up to 250 kOe) and then slowly reverts to the initial state by means of gradual decomposition of clusters of the reoriented moments. A theoretical estimate of the relaxation time is made. |
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