McGill.CA / Science / Department of Physics

CPM Seminar

Determination of the characteristic lengths of superconductors by means of magnetic force microscopy

Antonio Badía

Dpto. Física de la Materia Condensada
Universidad de Zaragoza

The main issues arising from the phenomenological theories of superconductivity relate to the so-called characteristic lengths of these materials. Furthermore, they can be used as a link between the thermodynamic scale and the underlying physical mechanisms. In particular, much attention has been paid to the determination of the penetration depth.

In the last decade, a promising new technique, magnetic force microscopy (MFM) has been applied, which offers the advantage of probing within very small areas of the sample. However, some open questions remain concerning the interpretation of measurements. Recent theoretical efforts have been devoted to determine whether the associated inverse problem is well posed.

Thursday, February 8th 2001, 15:30
Ernest Rutherford Physics Building, room 115