title: Modification of perpendicular magnetic anisotropy and domain wall velocity in Pt/Co/Pt by voltage-induced strain.
abstract: The perpendicular magnetic anisotropy K(eff), 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(eff), measured by the extraordinary Hall effect, is reduced by 10 kJ/m(3) by tensile strain out-of-plane ε(z) = 9 × 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.
authors.affiliation: School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, United Kingdom.
authors.forename: P M
authors.initials: PM
authors.lastname: Shepley
authors.affiliation: School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom.
authors.forename: A W
authors.initials: AW
authors.lastname: Rushforth
authors.affiliation: School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Wang
authors.affiliation: School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, United Kingdom.
authors.forename: G
authors.initials: G
authors.lastname: Burnell
authors.affiliation: School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, United Kingdom.
authors.forename: T A
authors.initials: TA
authors.lastname: Moore