Volume 115, Number 1, July 2016
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||27 July 2016|
Driving mechanism for damping and g-factor in non-amorphous ferromagnetic CoFeZr ultrathin films
1 Laboratoire de Magnétisme de Bretagne, CNRS, Université de Bretagne Occidentale - 6 avenue le Gorgeu, 29285 Brest Cedex, France
2 CEMES-CNRS - 29 rue Jeanne Marvig, 31055 Toulouse, France
Received: 10 May 2016
Accepted: 1 July 2016
We demonstrate that an in-plane uniaxial anisotropy may be induced in non-amorphous soft CoFeZr films. We used broadband ferromagnetic resonance spectroscopy and complex permeability spectra to investigate the spin dynamics in CoFeZr films. We report a systematic study of the FM thickness on the fundamental dynamic parameters such as the effective magnetisation, the g-factor and relaxation mechanisms. Our study reveals that the decrease of the effective magnetisation mesured with FMR with thickness is not due to perpendicular anisotropy but to low dimentionality. Moreover, we observed a decrease of the g-factor with thickness and a modification of the ratio of the orbital to the spin magnetic moment. These films exhibit good high-frequency performance red (i.e. high permeability in a broad frequency range and a low damping) at low thickness of about a few nanometers.
PACS: 76.50.+g – Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 75.50.Bb – Fe and its alloys
© EPLA, 2016
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.