Abstract
Magnetic films with in-plane magnetic anisotropy have been extensively applied in the field of magnetoelectronic devices. Here, we report a control method for the in-plane magnetic anisotropy of Ni80Fe20 films by localized magnetoelastic coupling. Nanotrenches are patterned on Ni80Fe20/polymethyl methacrylate bilayers, and the Young’s modulus mismatch between micro-patterned magnetic/polymer layers directionally releases the local stress. Due to magnetoelastic coupling, the directed tension distribution can rearrange the stripe domain along the patterned nanotrenches and induce the in-plane uniaxial magnetic anisotropy of the Ni80Fe20 films. Using hierarchically patterned tension distributions with 2D nanotrench arrays, in-plane biaxial magnetic anisotropy can be arbitrarily designable in Ni80Fe20 films.
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