The magnetic behavior of giant magnetostrictive TbFe/FeCo multilayers show that individual layers of as-deposited multilayers in their demagnetized state are single domain due to stray-field coupling between adjacent layers. Such multilayers do not show a collective behavior during magnetization reversal. In contrast, stress-free films obtained by annealing at 543 K for 1 h subdivide themselves into multiple domains to lower their overall energy, and show a collective magnetization behavior. An interesting observation is the dynamic formation and collapse of magnetoelastically induced domains in TbFe layers in annealed multilayers during reversal.
Magnetic mesostructure of giant magnetostrictive spring magnet type multilayers
Harsh Deep Chopra, A. Ludwig, E. Quandt, Susan Z. Hua, H. J. Brown, L. J. Swartzendruber, Manfred Wuttig; Magnetic mesostructure of giant magnetostrictive spring magnet type multilayers. J. Appl. Phys. 15 April 1999; 85 (8): 6238–6240. https://doi.org/10.1063/1.370232
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