Projekt

Theory of charged domain walls in multiferroic materials

Udbyder

Vejleder

Sted

København og omegn

Multiferroic materials are materials that are characterized by both magnetic order and charge order (ferroelectric order). The magnetic order can thus be manipulated with electric fields and vice versa. Typically, the ferroelectric order is arranged in certains domains and the boundary between two domains is called a domain wall. If the polarization in a domain has a component orthogonal to the domain it follows from standard electrostatics that the domain wall will be charged and the result is a two-dimensional metallic system localized at the domain wall.

In a multiferroic material the domain walls may be magnetic as well as metallic and one may obatain a unique two-dimensional magnet that can be manipulated with electric fields (beacause they are charged) and carry stable magnetization that is topologically protected by the domain structure.

The domain structure in multiferroics is currently a promising candidate for future non-volatile memory devices, since the domain boundaries are extremely sharp and allow for very dense data storage based on the domain structure.

In the present project we will unravel the physics of charged domain walls in multiferroic materials using first principles quantum mechanical computer simulations. In particualr we will examine the stability of charged domain walls and investigate the mechanism under which they form. We will then look into their physical properties such as magnetization, conductivity and mobility, which are the relevant quantities to understand if we are to contribute to the design and applicability of novel memory devices.

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Kontakt

Virksomhed/organisation

DTU Fysik

Navn

Thomas Olsen

Stilling

Lektor

Mail

tolsen@fysik.dtu.dk

Vejleder-info

Bachelor i Fysik og Nanoteknologi

Vejleder

Thomas Olsen

ECTS-point

15 - 30

Type

Bachelorprojekt, Kandidatspeciale

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

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Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

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