Abstract
Soft x-ray photoemission electron microscopy with an in situ magnetic field has been used to study the relationship between ferromagnetic and antiferromagnetic spin alignment and the switching/reversal field of epitaxial micromagnetic structures. We investigated a model system consisting of a bilayer of ferromagnetic La0.7Sr0.3MnO3 and antiferromagnetic LaFeO3 where the spin axes in each layer can be driven from mutually perpendicular (spin-flop) to parallel alignment by varying the temperature between 30 and 300 K. Results show that not only does this spin alignment noticeably influence the bilayer micromagnet coercivity compared to La0.7Sr0.3MnO3 single-layer micromagnets, but the coercivity within this materials system can be tuned over a wide range by careful balance of material properties.
| Original language | English |
|---|---|
| Article number | 014402 |
| Journal | Physical Review Materials |
| Volume | 1 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jun 26 2017 |
Funding
Funding for these experiments was obtained from the National Science Foundation (DMR 0747896 and 1411250), the Research Council of Norway (221860/F60), and the Outstanding Academic Fellows program at the Norwegian University of Science and Technology (E.F.). The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, and the U.S. Department of Energy (DE-AC02-05CH11231). Patterning of the micromagnets was performed at the Center for Nanophase Materials Sciences, a U.S. Department of Energy Office of Science User Facility.