Scanning SQUID Microscope for Studying Vortex Matter in Type-II Superconductors

Amit Finkler

ISBN 10: 3642431526 / ISBN 13: 9783642431524

Editore: Springer Berlin Heidelberg, Springer Berlin Heidelberg Jun 2014, 2014

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Neuware -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.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 76 pp. Englisch. Codice articolo 9783642431524

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Titolo: Scanning SQUID Microscope for Studying ...

Casa editrice: Springer Berlin Heidelberg, Springer Berlin Heidelberg Jun 2014

Data di pubblicazione: 2014

Legatura: Taschenbuch

Condizione: Neu

Descrizione articolo

Riassunto:

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.

Dalla quarta di copertina:

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.