Scanning SQUID Microscope for Studying Vortex Matter in Type-II Superconductors
(Sprache: Englisch)
This volume describes a major new advance in scanning 'SQUID' microscopy that surmounts limitations in spatial resolution by deploying a nano-sized superconducting quantum interference device judged capable of imaging the spin of a single electron.
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This volume describes a major new advance in scanning 'SQUID' microscopy that surmounts limitations in spatial resolution by deploying a nano-sized superconducting quantum interference device judged capable of imaging the spin of a single electron.
Klappentext zu „Scanning SQUID Microscope for Studying Vortex Matter in Type-II Superconductors “
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.
Inhaltsverzeichnis zu „Scanning SQUID Microscope for Studying Vortex Matter in Type-II Superconductors “
Introduction.- Scientific Background.- Open Questions.- Goal.- Methods.- SQUID-on-tip Fabrication.- Tuning Fork Assembly.- Scanning SQUID Microscopy.- Fabrication of Samples.- Results.- SQUID-on-tip Characterization.- Imaging.- Discussion.- Appendices.
Bibliographische Angaben
- Autor: Amit Finkler
- 2014, 2012, XIV, 62 Seiten, Maße: 15,5 x 23,5 cm, Kartoniert (TB), Englisch
- Verlag: Springer, Berlin
- ISBN-10: 3642431526
- ISBN-13: 9783642431524
Sprache:
Englisch
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