Low-noise modular microsusceptometer using nearly quantum limited dc SQUIDs
Awschalom, D. D. ; Rozen, J. R. ; Ketchen, M. B. ; Gallagher, W. J. ; Kleinsasser, A. W. ; Sandstrom, R. L. ; Bumble, B.
Woodbury, NY : American Institute of Physics (AIP)
Published 1988
Woodbury, NY : American Institute of Physics (AIP)
Published 1988
| ISSN: |
1077-3118
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
A flexible combination of superconducting integrated circuits was used to construct a low-temperature magneto-optic microsusceptometer utilizing a dc superconducting quantum inteference device (SQUID) detector operating near the quantum limit (coupled energy sensitivity of 1.7(h-dash-bar)). Miniature pick-up loop assemblies on transparent substrates were joined by superconducting interchip connections to a thin-film dc SQUID, which is in turn read out by a second dc SQUID connected to room-temperature electronics. Measurements on an 8.5-μm-diam titanium dot evaporated directly into the pick-up loop demonstrate a spin sensitivity of ∼103 spins/(Hz)1/2 at T=290 mK.
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| Type of Medium: |
Electronic Resource
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| URL: |