Abstract
Resonance frequency tuning in magnetic micromechanical resonators remains a primary field of study for frequency reference applications. The use of magnetic micromechanical resonators for innovative timing, oscillator and sensing applications necessitates a platform for the precise control of the resonance frequency. The present work addresses a deformation-based technique for tuning the resonance frequency of nickel micromechanical resonators. Frequency response is measured through magnetic actuation and optical readout. The tuning approach is based on a combination of flexural deformation and uniaxial strain. The bending deformation is achieved by using a DC current through the microbeam. This magnetomotive mechanism reduces the resonance frequency by about 13% for a maximum DC current of 80 mA. A substrate bending method is used for applying uniaxial strain to increase the resonance frequency by about 8%. A bi-directional frequency modulation is thus demonstrated by utilizing both deformation techniques. The interpretation of results is carried out by finite element analysis and electromechanical analogy in an equivalent circuit. Using deformation techniques, this study provides a rigorous approach to control the resonance frequency of magnetic micromechanical resonators.
| Original language | English |
|---|---|
| Article number | 105003 |
| Number of pages | 8 |
| Journal | Journal of Micromechanics and Microengineering |
| Volume | 28 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 22 Jun 2018 |
Bibliographical note
Funding Information:This work was carried out in Koç University Cleanroom Laboratory supported by ISTKA under Grant TR10/16/ YNY/0103 ‘Nanotechnology Platform for the Accessible and Sustainable Pilot Fabrication of HighAddedValue Products’.
Publisher Copyright:
© 2018 IOP Publishing Ltd.
Keywords
- deformation
- frequency tuning
- magnetic actuation
- magnetomotive force
- micromechanical resonators
- stress