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Lecture Sarah Thompson

Rooster

WanneerWaar
10 maart 2010 FWN-Building 5113.0202, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. Sarah Thompson
Affiliation: Department of Physics, University of York, UK
Title: Remotely sensing and imaging magnetoresistance
Date: Wed Mar 10, 2010
Start: 15.30
Location: FWN-Building 5113.0202
Host: T. Banerjee
Telephone: +31 50 363 8394

Abstract

The 2007 Nobel Prize winning discovery of Giant Magnetoresistance created the field of spintronics in which the consequences of the electron spin on the electrical conductivity are explored and exploited. At infrared wavelengths the dielectric response of a metal is directly related to the d.c. electrical conductivity of the material with the result that the refractive index is sensitive to the electrical resistivity. This has enabled the development of a series of related techniques for the remote sensing and 2D imaging of magnetotransport based on this phenomenon known as the magnetorefractive effect. These techniques variously measure the change in reflected, transmitted or emitted intensity as a function of magnetic field and offer contactless and non-destructive probes of magnetotransport which are shown to correlate directly with magnetoresistance in a wide range of materials including giant magnetoresistive multilayers, colossal magnetoresistive manganites and magnetic oxides such as magnetite.

Laatst gewijzigd:22 oktober 2012 14:30