Measurement of small forces in micron-sized resonators

Mohanty, Pritiraj; Harrington, D. A.; Roukes, M. L.

doi:10.1016/s0921-4526(99)02997-x

Cited by 23 publications

(17 citation statements)

References 10 publications

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“…1 In spite of the obvious importance of single-crystal resonators in areas such as gravity-wave detection and high-precision measurements, [2][3][4][5][6][7][8][9][10] their acoustic properties are not very well understood. The cause of dominant dissipation, for example, in resonators of any size at low temperatures, is not known, the primary reason being the lack of extensive experiments on acoustic energy loss in single-crystal resonators at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic dissipation in high-frequency micromechanical resonators

et al. 2002

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We report measurements of intrinsic dissipation in micron-sized suspended resonators machined from single crystals of galium arsenide and silicon. In these experiments on high-frequency micromechanical resonators, designed to understand intrinsic mechanisms of dissipation, we explore dependence of dissipation on temperature, magnetic field, frequency, and size. In contrast to most of the previous measurements of acoustic attenuation in crystalline and amorphous structures in this frequency range, ours is a resonant measurement; dissipation is measured at the natural frequencies of structural resonance, or modes of the structure associated with flexural and torsional motion. In all our samples we find a weakly temperature dependent dissipation at low temperatures. We compare and contrast our data to various probable mechanisms, including thermoelasticity, clamping, anharmonic mode-coupling, surface anisotropy and defect motion, both in bulk and on surface. The observed parametric dependencies indicate that the internal defect motion is the dominant mechanism of intrinsic dissipation in our samples.

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Section: Introductionmentioning

confidence: 99%

Intrinsic dissipation in high-frequency micromechanical resonators

et al. 2002

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“…A cantilever gate electrode located directly above the SET island with displacement measured using either the magnetomotive method [11] or fibre optic interferometer [10] might serve as the electrometer.…”

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confidence: 99%

“…By measuring both the amplitude and phase of the cantilever displacement and averaging over sufficiently many cycles [11], the dependence of the SET force noise on gate voltage for a given current peak can be determined.…”

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confidence: 99%

Micromechanical electrometry of single-electron transistor island charge

Blencowe

Zhang

2002

Physica B: Condensed Matter

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“…However, sensitivities of 0.1 to 10 fN in "magnetic resonant force microscopy (MRFM)" have been reported [14,15]. More recently, the detection of forces in the attonewton range has been achieved [16,17]. loy).…”

Section: Methodsmentioning

confidence: 99%

Magnetic Casimir effect

Metalidis

Bruno

2002

Phys. Rev. A

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The Casimir effect results from alterations of the zero-point electromagnetic energy introduced by boundary-conditions. For ferromagnetic layers separated by vacuum (or a dielectric) such boundaryconditions are influenced by the magneto-optical Kerr effect. We will show that this gives rise to a long-range magnetic interaction and discuss the effect for two different configurations (magnetization parallel and perpendicular to the layers). Analytical expressions are derived for two models and compared to numerical calculations. Numerical calculations of the effect for Fe are also presented and the possibility of an experimental observation of the Casimir magnetic interaction is discussed.

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Measurement of small forces in micron-sized resonators

Cited by 23 publications

References 10 publications

Intrinsic dissipation in high-frequency micromechanical resonators

Intrinsic dissipation in high-frequency micromechanical resonators

Micromechanical electrometry of single-electron transistor island charge

Magnetic Casimir effect

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