Rigid body dynamics of diamagnetically levitating graphite resonators

Journal article (2020)

Authors

X. Chen Dynamics of Micro and Nano Systems - Mechanical, Maritime and Materials Engineering
A. Keşkekler Dynamics of Micro and Nano Systems - Mechanical, Maritime and Materials Engineering
F. Alijani Dynamics of Micro and Nano Systems - Mechanical, Maritime and Materials Engineering
P.G. Steeneken QN/Steeneken Lab - AS , Dynamics of Micro and Nano Systems - Mechanical, Maritime and Materials Engineering , Kavli institute of nanoscience Delft
Research Group
Dynamics of Micro and Nano Systems (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2020 X. Chen, A. Keşkekler, F. Alijani, P.G. Steeneken
DOI: https://doi.org/10.1063/5.0009604
More Info
expand_more

Published Date

2020

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Mechanical, Maritime and Materials Engineering

Department

Precision and Microsystems Engineering

Research Group

Dynamics of Micro and Nano Systems

Abstract

Diamagnetic levitation is a promising technique for realizing resonant sensors and energy harvesters since it offers thermal and mechanical isolation from the environment at zero power. To advance the application of diamagnetically levitating resonators, it is important to characterize their dynamics in the presence of both magnetic and gravitational fields. Here we experimentally actuate and measure rigid body modes of a diamagnetically levitating graphite plate. We numerically calculate the magnetic field and determine the influence of magnetic force on the resonance frequencies of the levitating plate. By analyzing damping mechanisms, we conclude that eddy current damping dominates dissipation in mm-sized plates. We use finite element simulations to model eddy current damping and find close agreement with experimental results. We also study the size-dependent Q-factors (Qs) of diamagnetically levitating plates and show that Qs above 100 million are theoretically attainable by reducing the size of the diamagnetic resonator down to microscale, making these systems of interest for next generation low-noise resonant sensors and oscillators.

Files

5.0009604.pdf
(.pdf | 2.59 Mb)
- Embargo expired in 16-06-2021