Asymmetry in elementary events of magnetization reversal in a ferromagnetic/antiferromagnetic bilayer
VI Nikitenko, VS Gornakov, AJ Shapiro, RD Shull… - Physical Review Letters, 2000 - APS
Physical Review Letters, 2000•APS
Real-time magneto-optical indicator film images reveal distinct asymmetry in the motion of a
single domain wall in a wedged-NiFe/uniform-FeMn bilayer due to the nucleation and
behavior of an exchange spring in the antiferromagnetic layer. Magnetization reversal from
the ground state begins at the thick end of the wedge where the exchange anisotropy field
(HE) is minimal and the magnetostatic field (H MS) is maximal, whereas reversal into the
ground state begins from the thin end where HE is maximal and H MS is minimal.
single domain wall in a wedged-NiFe/uniform-FeMn bilayer due to the nucleation and
behavior of an exchange spring in the antiferromagnetic layer. Magnetization reversal from
the ground state begins at the thick end of the wedge where the exchange anisotropy field
(HE) is minimal and the magnetostatic field (H MS) is maximal, whereas reversal into the
ground state begins from the thin end where HE is maximal and H MS is minimal.
Abstract
Real-time magneto-optical indicator film images reveal distinct asymmetry in the motion of a single domain wall in a wedged-NiFe/uniform-FeMn bilayer due to the nucleation and behavior of an exchange spring in the antiferromagnetic layer. Magnetization reversal from the ground state begins at the thick end of the wedge where the exchange anisotropy field (H E) is minimal and the magnetostatic field (H MS) is maximal, whereas reversal into the ground state begins from the thin end where H E is maximal and H MS is minimal.
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