Tuning of the nucleation field in nanowires with perpendicular magnetic anisotropy
- Institut fuer Angewandte Physik und Zentrum fuer Mikrostrukturforschung Hamburg, Universitaet Hamburg, Jungiusstr. 11, 20355 Hamburg (Germany)
- Institut fuer Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden (Germany)
- Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
We report on domain nucleation in nanowires consisting of Co/Pt multilayers with perpendicular magnetic anisotropy that are patterned by electron-beam lithography, sputter deposition, and lift-off processing. It is found that the nucleation field can be tuned by changing the geometry of the wire ends. A reduction of the nucleation field by up to 60% is achieved when the wire ends are designed as tips. This contrasts with the behavior of wires with in-plane anisotropy where the nucleation field increases when triangular-pointed ends are used. In order to clarify the origin of the reduction of the nucleation field, micromagnetic simulations are employed. The effect cannot be explained by the lateral geometrical variation but is attributable to a local reduction of the perpendicular anisotropy caused by shadowing effects due to the resist mask during sputter deposition of the multilayer.
- OSTI ID:
- 22102368
- Journal Information:
- Journal of Applied Physics, Vol. 113, Issue 16; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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