Interfacial perpendicular magnetic anisotropy and damping parameter in ultra thin Co2FeAl films
Abstract
B2-ordered Co2FeAl films were synthesized using an ion beam deposition tool. A high degree of chemical ordering ∼81.2% with a low damping parameter (α) less than 0.004 was obtained in a 50 nm thick film via rapid thermal annealing at 600 °C. The perpendicular magnetic anisotropy (PMA) was optimized in ultra thin Co2FeAl films annealed at 350 °C without an external magnetic field. The reduced thickness and annealing temperature to achieve PMA introduced extrinsic factors thus increasing α significantly. However, the observed damping of Co2FeAl films was still lower than that of Co60Fe20B20 films prepared at the same thickness and annealing temperature.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 22, 2013
- Source ID
- 10.1063/1.4802952
Entities
People
- Behrouz Khodadadi
- Jiwei Lu
- Sebastian Schäfer
- Stuart A. Wolf
- Tim Mewes
- Yishen Cui
Organizations
- Defense Advanced Research Projects Agency
- National Science Foundation
- University of Alabama
- University of Virginia