Micromechanical "Trampoline" Magnetometers for Use in Large Pulsed Magnetic Fields-Reference-Cited by-同舟云学术

Micromechanical "Trampoline" Magnetometers for Use in Large Pulsed Magnetic Fields

Published:1998-05 Issue:5364 Volume:280 Page:720-722
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Aksyuk V.¹²,Balakirev F. F.¹²,Boebinger G. S.¹²,Gammel P. L.¹²,Haddon R. C.¹²,Bishop D. J.¹²

Affiliation:

1. V. Aksyuk, P. L. Gammel, R. C. Haddon, D. J. Bishop, Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA.

2. F. F. Balakirev and G. S. Boebinger, Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA, and Los Alamos National Laboratory, MS E536, Los Alamos, NM 87545, USA.

Abstract

A silicon micromechanical magnetometer was constructed and successfully used in 60-tesla pulsed magnetic fields of less than 100-millisecond duration. The device is small, inexpensive to fabricate, and easy to use. It features a fast mechanical response (up to 50,000 hertz) and extremely high sensitivity yet is relatively robust against electrical and mechanical noise. Quantum oscillations in the magnetization of a 1-microgram sample of an organic superconductor, κ-[bis(ethylenedithio)tetrathiafulvalene] 2 Cu(NCS) 2 , have been observed with this device.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference12 articles.

1. There are two relevant limits: (i) the “hard spring limit ” in which our device operates where F = k δ z ( k is the total spring constant) and (ii) the “soft spring limit ” in which F = md 2 z / dt 2 ( m is the total mass of the mobile plate plus sample).

2. For example the magnetometer can survive being dropped on the floor although we do this as infrequently as possible.

3. Given the 300 μm by 300 μm by 1.5 μm size of that mobile plate its mass can be calculated to be 0.31 μg from which k was determined to be 1.2 N m −1 . No significant change in f res or k was observed between room temperature and 4.2 K.

4. The growth and characterization of the samples are described in Haddon R. C., Glarum S. H., Chichester S. V., Ramirez A. P., Zimmerman N. M., Phys. Rev. B 43, 2642 (1991).

5. Caulfield J., et al., J. Phys. Condens. Matter6, 2911 (1994).

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