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

  • AmitĀ Finkler

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xiii
  2. Amit Finkler
    Pages 1-16
  3. Amit Finkler
    Pages 17-28
  4. Amit Finkler
    Pages 29-44
  5. Amit Finkler
    Pages 45-46
  6. Back Matter
    Pages 47-62

About this book


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.


Magnetic Imaging NanoSQUID Outstanding Doctoral Thesis Resolution of Magnetic Structures Scanning SQUID Microscope Tuning-Fork Microscopy Vortices in Superconductors

Authors and affiliations

  • AmitĀ Finkler
    • 1
  1. 1., Department of Condensed Matter PhysicsWeizmann Institute of ScienceRehovotIsrael

Bibliographic information