University of Birmingham > Talks@bham > Condensed Matter Physics Seminars > The Study of Superconducting Vortices using Transmission Electron Microscopy

The Study of Superconducting Vortices using Transmission Electron Microscopy

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  • UserDr. Charlotte Bowell, University of Cambridge
  • ClockFriday 11 December 2009, 14:00-15:00
  • HousePhysics East 217.

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Vortices in a Type-II superconductor can be imaged using a transmission electron microscope (TEM), as the electron beam is deflected by the penetrated magnetic flux. This technique was pioneered by Tonomura et al. [1], using a specially adapted microscope. Recently, it has been demonstrated that vortex imaging is also possible on a commercial TEM [2]. The talk will give an introduction to the technique and discuss the various different ways that information about the vortex structure can be gathered. A challenge of TEM is producing samples that are sufficently thin (~ 200 nm) such that they are transparent to the electron beam, so several different sample preparation techniques will be discussed. Recent measurements on BSSCO and YBCO -124 will be presented.

[1] Harada et al., Nature 360, 51 – 53 (1992).

[2] J. C. Loudon and P. A. Midgley, Ultramicroscopy 109: 700-729 (2009).

This talk is part of the Condensed Matter Physics Seminars series.

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