Scanning SQUID Microscope for Studying Vortex Matter in Type-II Superconductors - Springer Theses (Paperback)
  • Scanning SQUID Microscope for Studying Vortex Matter in Type-II Superconductors - Springer Theses (Paperback)
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Scanning SQUID Microscope for Studying Vortex Matter in Type-II Superconductors - Springer Theses (Paperback)

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Paperback 62 Pages / Published: 11/06/2014
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Common methods of local magnetic imaging display either a high spatial resolution and relatively poor field sensitivity (MFM, Lorentz microscopy), or a relatively high field sensitivity but limited spatial resolution (scanning SQUID microscopy). Since the magnetic field of a nanoparticle or nanostructure decays rapidly with distance from the structure, the achievable spatial resolution is ultimately limited by the probe-sample separation. This thesis presents a novel method for fabricating the smallest superconducting quantum interference device (SQUID) that resides on the apex of a very sharp tip. The nanoSQUID-on-tip displays a characteristic size down to 100 nm and a field sensitivity of 10^-3 Gauss/Hz^(1/2). A scanning SQUID microsope was constructed by gluing the nanoSQUID-on-tip to a quartz tuning-fork. This enabled the nanoSQUID to be scanned within nanometers of the sample surface, providing simultaneous images of sample topography and the magnetic field distribution. This microscope represents a significant improvement over the existing scanning SQUID techniques and is expected to be able to image the spin of a single electron.

Publisher: Springer-Verlag Berlin and Heidelberg GmbH & Co. KG
ISBN: 9783642431524
Number of pages: 62
Weight: 134 g
Dimensions: 235 x 155 x 4 mm
Edition: 2012 ed.

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