Guedes, A., Patil, S.B. , Cardoso, S., Chu, V., Conde, J. P. and Freitas, P. P. (2008) Hybrid magnetoresistive∕microelectromechanical devices for static field modulation and sensor 1∕f noise cancellation. Journal of Applied Physics, 103(7), 07E924. (doi: 10.1063/1.2837661)
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Abstract
Low frequency 1∕f1∕f noise in magnetoresistive (MR) spin valve sensors was suppressed by modulating an external dc magnetic field at high frequency microelectromechanical system using a (MEMS) microcantilever structure with an integrated magnetic flux guide. With this hybrid MR∕MEMS device, direct detection of dc magnetic fields in the sensor high frequency thermal noise regime was achieved. The microcantilever was actuated using a gate electrode by applying an ac voltage with frequency ff, causing it to oscillate at 2f2f. Measurements show detection of a dc magnetic field at 2f2f frequency (400kHz)(400kHz), where sensor 1∕f1∕f noise is two orders of magnitude lower than dc.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Patil, Dr Samadhan |
| Authors: | Guedes, A., Patil, S.B., Cardoso, S., Chu, V., Conde, J. P., and Freitas, P. P. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Journal of Applied Physics |
| Publisher: | American Institute of Physics |
| ISSN: | 0021-8979 |
| ISSN (Online): | 1089-7550 |
| Published Online: | 11 March 2008 |
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