He+ irradiation drives Bloch-to-Néel domain wall transition in Ta/CoFeB/MgO, observed via bubble morphology, with threshold dose 12-16 × 10^18 He+/m² matching 1D model estimates.
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Bloch-to-N\'eel domain wall transition evinced through morphology of magnetic bubble expansion in Ta/CoFeB/MgO layers
He+ irradiation drives Bloch-to-Néel domain wall transition in Ta/CoFeB/MgO, observed via bubble morphology, with threshold dose 12-16 × 10^18 He+/m² matching 1D model estimates.