Abstract
The effect of current annealing on the velocity of the single domain wall, sDW, and its dynamic stability is investigated in the 80–400 K temperature range for FeCoMoB nanocrystalline microwires. In addition to the heating effect of thermal treatments in a conventional field-free furnace, current annealing induces circumferential magnetic anisotropy, which significantly modifies the sDW dynamics characteristics. Such an anisotropy leads to an increased high domain wall velocity with a maximum measured value of about 8 km s−1. An unexpected increase in the domain wall velocity and mobility at 175 K is ascribed to the compensation of the anisotropy distribution. Finally, the domain wall dynamics exhibit very stable behaviour in a wide range of temperatures (200–400 K).
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