The Study of Superconducting Vortices using Transmission Electron Microscopy

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• Dr. Charlotte Bowell, University of Cambridge
• Friday 05 February 2010, 14:00-15:00
• Physics East 217.

If you have a question about this talk, please contact Elizabeth Blackburn.

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.

This talk is included in these lists:

• Bham Talks
• Cond. Mat. seminar
• Condensed Matter Physics Seminars
• Physics East 217
• What's on in Physics?

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