Exchange-coupling behavior in nanostructured FePt/Fe bilayer films
Abstract
Different thicknesses of FePt/Fe bilayer films are deposited on (001) MgO substrates by sputtering Fe and Pt targets with in-situ heating at 830OC. X-ray diffraction indicates a complete alignment of the FePt [001] axis with MgO [001] axis. The nucleation field Hn is estimated from hysteresis loops measured using a SQUID magnetometer. A FePt/Fe bilayer model is proposed to calculate the nucleation field Hn and compared with the experimental data. The model can explain experimental trends and gives useful predictions for nanostructure synthesis and further experiment.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 02, 2016
- Source ID
- 10.1063/1.4943414
Entities
People
- D. J. Sellmyer
- Y. Liu
Organizations
- Army Research Office
- University of Nebraska–Lincoln