Patterned growth of crystalline Y3Fe5O12 nanostructures with engineered magnetic shape anisotropy
Abstract
We demonstrate patterned growth of epitaxial yttrium iron garnet (YIG) thin films using lithographically defined templates on gadolinium gallium garnet substrates. The fabricated YIG nanostructures yield the desired crystallographic orientation, excellent surface morphology, and narrow ferromagnetic resonance (FMR) linewidth (∼4 Oe). Shape-induced magnetic anisotropy is clearly observed in a patterned array of nanobars engineered to exhibit the larger coercivity (40 Oe) compared with that of continuous films. Both hysteresis loop and angle-dependent FMR spectra measurements indicate that the easy axis aligns along the longitudinal direction of the nanobars, with an effective anisotropy field of 195 Oe. Our work overcomes difficulties in patterning YIG thin films and provides an effective means to control their magnetic properties and magnetic bias conditions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 19, 2017
- Source ID
- 10.1063/1.4986474
Entities
People
- Andrew Franson
- E. Johnston-halperin
- Hong X Tang
- Houchen Chang
- Mingzhong Wu
- Na Zhu
- Tao Liu
- Xufeng Zhang
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Center for Hierarchical Manufacturing
- Colorado State University
- David and Lucile Packard Foundation
- Defense Advanced Research Projects Agency
- Ohio State University
- Yale University