Self-aligned Ni/NiFe/Fe magnetic lateral heterostructures

TitleSelf-aligned Ni/NiFe/Fe magnetic lateral heterostructures
Publication TypeJournal Article
Year of Publication2015
AuthorsShimon, G, Ross, CA, Adeyeye, AO
JournalJournal of Applied Physics
Date Published2015/10/21/

The fabrication and magnetization reversal mechanism of a self-aligned Ni/Ni80Fe20/Fe lateral heterostructure (LH) are presented. Using a combination of angled deposition and multiple selective etching processes, high quality LHs are successfully fabricated consisting of an array of bi-component dots made of a lens and a crescent of two different materials surrounded by antidot of a third material. Three materials, Ni, NiFe, and Fe, are combined in different orders to make the lens, crescent, and antidot. In isolated bi-component dots without the antidot matrix, the region with lower M-S first undergoes a single-domain reversal followed by the vortex nucleation-annihilation reversals of the region with higher M-S. In the LH, the antidot matrix interacts magnetostatically with the bi-component dots and modifies the switching fields, with the reversal process depending on which material forms the antidot. The fabrication technique and the tunable reversal process presented in this work are useful for designing functional magnetoelectronic devices. (C) 2015 AIP Publishing LLC.