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Towards measuring the magnetic field of single atoms: EMCD in electron microscope

About This PhD Project

Project Description

The desire for investigation tools with the ability of detecting very localized magnetic properties down to atomic scale is driven by the need of drive of developing ultrafast, low power and non-volatile data and logic devices.

Electron magnetic circular dichroism (EMCD) in an electron microscope, is a method with the potential to reach the ultimate goal of detecting magnetic property of a single atom. This capability would allow understanding the magnetism of nanostructures which includes nanoparticles, artificial heterostructures for logic and data storage, as well as answering some of the fundamental questions in magnetism and spintronics.

This project aims to establish the experimental methodology for atomic scale EMCD measurements in a state of the art Scanning Transmission Electron Microscope and apply those to investigate the magnetic properties of selected material structures. As most of EMCD studies suffer from low magnetic signal to noise ratios and thus even in optimized experimental conditions data collection can be challenging, part of the proposed project will be the development of advanced data-processing methods for atomic resolution EMCD extraction.

The experiments will take part on the state of the art microscopes at the UK national facility for electron microscopy (SuperSTEM) at Daresbury. The project is in collaboration with Dr. Jan Rusz, Upsala University, Sweden.

Advisors: Dr Demie Kepaptsoglou and Dr Vlado Lazarov.

Related Subjects

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