Publications
Study of reorientation processes in L10-ordered FePt thin films
- Author(s)
- Marcus Rennhofer, Miroslaw Kozlowski, Bart Laenens, Bogdan Sepiol, Rafal Kozubski, Dries Smeets, A Vantomme
- Abstract
We report on the development of structural and magnetic order in epitaxially grown L1(0) FePt thin films. Upon annealing, the easy axis of magnetization changes from the out-of-plain into the in-plain direction. We found that the overall fraction of reoriented domains first increases but after certain time decreases before achieving a saturated state. The results are based on conversion electron Mossbauer spectroscopy studies and confirm Monte Carlo simulations in nano-layered FePt. We present a modified version of the Johnson-Mehl-Avrami (JMA) model adequately describing the experimental findings. Two dynamical processes, the first being a 2D-growth. dominate the initial state of sample annealing and the second being a 3D-growth, dominate the late stage close to saturation From an Arrhenius plots of JMA coefficients for both processes we extracted the activation energies of the underlying dynamics which are 1.5(1) eV for disordering and 0.8(2) eV for ordering.
- Organisation(s)
- Dynamics of Condensed Systems
- External organisation(s)
- Jagiellonian University in Krakow, Katholieke Universiteit Leuven
- Journal
- Intermetallics
- Volume
- 18
- Pages
- 2069-2076
- No. of pages
- 8
- ISSN
- 0966-9795
- DOI
- https://doi.org/10.1016/j.intermet.2010.06.011
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103020 Surface physics, 103009 Solid state physics, 210006 Nanotechnology, 103018 Materials physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/study-of-reorientation-processes-in-l10ordered-fept-thin-films(19f61b13-7f49-4c58-a017-11b0dccc61d9).html