Strain-induced magnetization change in patterned ferromagnetic nickel nanostructures
Abstract
We report strain-induced coercive field changes in patterned 300 × 100 × 35 nm3 Ni nanostructures deposited on Si/SiO2 substrate using the magnetoelastic effect. The coercive field values change as a function of the applied anisotropy strain (∼1000 ppm) between 390 and 500 Oe, demonstrating that it is possible to gradually change the coercive field elastically. While the measured changes in coercive field cannot be accurately predicted with simple analytical predictions, fairly good agreement is obtained by using a micromagnetic simulation taking into account the influence of nonuniform strain distribution in the Ni nanostructures. The micromagnetic simulation includes a position dependant strain-induced magnetic anisotropy term that is computed from a finite element mechanical analysis. Therefore, this study experimentally corroborates the requirement to incorporate mechanical analysis into micromagnetic simulation for accurately predicting magnetoelastic effects in patterned ferromagnetic nanostructures.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 15, 2011
- Source ID
- 10.1063/1.3592344
Entities
People
- Alexandre Bur
- Chin-jui Hsu
- Gregory P. Carman
- Hyungsuk K. D. Kim
- Joshua Hockel
- Kang L. Wang
- Kin Wong
- Tao Wu
- Tien-kan Chung
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- National Chiao Tung University
- University of California