Abstract
Current-induced domain wall motion in TbFeCo micro wire with perpendicular anisotropy has been observed by Kerr microscope. The critical current density in ferrimagnetic TbFeCo was found to be as low as 5.4 × 1010 A/m2 which is at least 1 order s maller than in other metallic materials reported so far. The results show that the critical current density can be reduced by controlling pinning sites in micro wire.
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