| Scanning magnetoresistance microscopy of atom chips. | |
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MedLine Citation:
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PMID: 18315300 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Surface based geometries of microfabricated wires or patterned magnetic films can be used to magnetically trap and manipulate ultracold neutral atoms or Bose-Einstein condensates. We investigate the magnetic properties of such atom chips using a scanning magnetoresistive (MR) microscope with high spatial resolution and high field sensitivity. By comparing MR scans of a permanent magnetic atom chip to field profiles obtained using ultracold atoms, we show that MR sensors are ideally suited to observe small variations of the magnetic field caused by imperfections in the wires or magnetic materials which ultimately lead to fragmentation of ultracold atom clouds. Measurements are also provided for the magnetic field produced by a thin current-carrying wire with small geometric modulations along the edge. Comparisons of our measurements with a full numeric calculation of the current flow in the wire and the subsequent magnetic field show excellent agreement. Our results highlight the use of scanning MR microscopy as a convenient and powerful technique for precisely characterizing the magnetic fields produced near the surface of atom chips. |
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Authors:
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M Volk; S Whitlock; C H Wolff; B V Hall; A I Sidorov |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Review of scientific instruments Volume: 79 ISSN: 0034-6748 ISO Abbreviation: Rev Sci Instrum Publication Date: 2008 Feb |
Date Detail:
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Created Date: 2008-03-04 Completed Date: 2008-04-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0405571 Medline TA: Rev Sci Instrum Country: United States |
Other Details:
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Languages: eng Pagination: 023702 Citation Subset: - |
Affiliation:
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ARC Centre of Excellence for Quantum-Atom Optics and Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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