Vortrag: Domain boundaries as active physical and chemical elements for memory devices, 16.06.2009, 17:00 Uhr

16 Jun 2009 by in Studium

Im Rahmen der Vorträge der chemisch-physikalischen Gesellschaft hält Prof. Dr. Ekhard K. H. Salje vom Department of Earth Sciences, University of Cambridge, UK einen Vortrag zum Thema "Domain boundaries as active physical and chemical elements for memory devices"

Dieser Vortrag findet am 16.06.2009 um 17:00 Uhr im Lise-Meitner-Hörsaal der Fakultät für Physik der Universität Wien (1. Stock, Boltzmanngasse 5/Strudlhofgasse 4, 1090 Wien) statt.


I will discuss the idea that domain boundaries, rather than domains, can carry information and act
as memory devices. Domains are bulk objects; their large response to changing external fields is
related to their change in volume which implies the movement of domain boundaries. In many
cases, the design of ‘optimal’ domain structures corresponds to ‘optimal’ domain boundaries with
parameters such as the domain boundary mobility, pinning properties and the formation of specific
boundaries such as curved boundaries or needle domains. This argument is enhanced further in
this review: domain boundaries themselves can host properties which are absent in the bulk, they
can be multiferroic, super- or semi-conductors while the matrix shows none of these properties. It
is agued that multiferroic walls can be described formally as chiral whereby the chirality relates to
state-vectors such as polarization and magnetic moment and their (non-linear) coupling. Once
such walls can be generated reliably, a new generation of devices with much higher storage
density than ever produced before can be envisaged.

Eine Zusammenfassung findet man auf der Webseite der chemisch-physikalischen Gesellschaft unter http://www.cpg.univie.ac.at/Salje.pdf .


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Topic revision: r1 - 16 Jun 2009, waliddPHYSIKFHTUFAT

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