Pseudomorphic spinel ferrite films with perpendicular anisotropy and low damping
Abstract
We report on epitaxial thin films of spinel ferrite Ni0.65Zn0.35Fe1.2Al0.8O4 with strain-induced perpendicular magnetic anisotropy (PMA) and low magnetic damping. Static magnetometry and broadband ferromagnetic resonance experiments show a distinct change in the preferred direction of magnetization from in-plane to out-of-plane when the coherent strain in films changes from ∼2% compressive on (001) MgAl2O4 to ∼0.5% tensile on (001) MgGa2O4 substrates. Significant deviations from the spin-only value (2.0) of the g-factor suggest spin-orbit effects and further support our conclusion of strain-driven magnetic anisotropy in these films. The low Gilbert damping parameter of α = 5 × 10−3 in these ferrite films, combined with their PMA, makes them promising for spintronic and frequency-agile microwave device applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 20, 2018
- Source ID
- 10.1063/1.5023118
Entities
People
- Benjamin A. Gray
- Brandon M. Howe
- Hadley Smith
- Hyung-min Jeon
- Jacob J. Wisser
- Maxwell Schmitt
- Michael E. McConney
- Michael R Page
- Piyush J Shah
- R. C. Budhani
- Satoru Emori
- Yuri Suzuki
- Zbigniew Galazka
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory
- Leibniz Institute for Crystal Growth
- Morgan State University
- Stanford University
- Virginia Tech
- Wright State University