Modification of perpendicular magnetic anisotropy and domain wall velocity in Pt/Co/Pt by voltage-induced strain

Abstract

The perpendicular magnetic anisotropy K${}_e$${}_f$${}_f$, magnetization reversal, and field-driven domain wall velocity in the creep regime are modified in Pt/Co(0.85-1.0 nm)/Pt thin films by strain applied via piezoelectric transducers. K${}_e$${}_f$${}_f$, measured by the extraordinary Hall effect, is reduced by 10 kJ/m${}^3$ by tensile strain out-of-plane ε${}_z$ = 9 x 10-4, independently of the film thickness, indicating a dominant volume contribution to the magnetostriction. The same strain reduces the coercive field by 2-4 Oe, and increases the domain wall velocity measured by wide-field Kerr microscopy by 30-100 %, with larger changes observed for thicker Co layers. We consider how strain-induced changes in the perpendicular magnetic anisotropy can modify the coercive field and domain wall velocity.

References in corpus (10)

• Current-driven dynamics of chiral ferromagnetic domain walls
• Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
• Creep and depinning in disordered media
• Electric-field control of magnetic domain wall motion and local magnetization reversal
• Current-induced domain wall motion in a nanowire with perpendicular magnetic anisotropy
• Voltage controlled inversion of magnetic anisotropy in a ferromagnetic thin film at room temperature
• Pinning dependent field driven domain wall dynamics and thermal scaling in an ultrathin Pt/Co/Pt magnetic film
• Non-volatile voltage control of magnetization and magnetic domain walls in magnetostrictive epitaxial thin films
• Numerical Approaches on Driven Elastic Interfaces in Random Media
• Electric-field control of domain wall nucleation and pinning in a metallic ferromagnet

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• Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers
• Strong reduction of the coercivity by a surface acoustic wave in an out-of-plane magnetized epilayer
• Analytic theory for the switch from Bloch to Néel domain wall in nanowires with perpendicular anisotropy
• Magnetic properties, domain wall creep motion and the Dzyaloshinskii-Moriya interaction in Pt/Co/Ir thin films
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• Large-scale Monte Carlo simulations for the depinning transition in Ising-type lattice models
• Transport of skyrmions by surface acoustic waves
• Absence of Walker breakdown in the dynamics of chiral Neel domain walls driven by in-plane strain gradients