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We have investigated the contribution of stochastic thermally activated processes to the electric-field effects on coercivity in FePt. Coercive field distributions were measured under different gate voltages in solid-state field-effect structures. For low voltages, a shift in the coercive field distribution can be observed; however, it is not larger than the width of the distribution. Higher voltages are needed to obtain the splitting from the negative (zero) voltage distribution allowing for the unambiguous characterization of the electric-field effect. A virtual unipolarity in the electric-field effect has been identified as a feature introduced by the dielectric layer that disappears upon annealing.
Published in:
Applied Physics Letters
(Volume:102
,
Issue:
1
)
Date of Publication: Jan 2013
- Page(s):
- 012409 - 012409-4
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.4774382
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 10 January 2013
- Issue Date :
- Jan 2013
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