Functional Interfaces in Ferroeleastic Materials

Salje, E. K. H. (2013) Functional Interfaces in Ferroeleastic Materials. In: SMST-2013:The International Conference on Shape Memory and Superelastic Technologies (SMST) (ASM International), Tuesday, 21/05/2013 - Friday, 24/05/2013, OREA Hotel Pyramida Belohorska 24, Prague 6, Czech Republic.

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Abstract

Functional interfaces, such as multiferroic twin boundaries in passive matrices, are expected to lead to device fabrication where functionality of materials is not related to bulk properties but to interfacial properties. Eminent examples are superconducting interfaces in insulating matrices [1], ferroelectric twin boundaries in non-polar materials [2] and defect accumulation together with the nucleation of dislocations in alloys [3-7]. The superelastic properties are destroyed in the latter case by the pinning of dislocations attached to martensitic twin boundaries [6]. As functionalities are strongly located in a sample (namely inside twin boundaries) one obtains high-density memory devices and rapid response times as required in electronic materials [8-10]. The idea that twin boundaries play a more important role than just a link between two twin domains is relatively new. The first observation was the discovery that the conductivity in martensitic twin boundaries can be much greater than that of the bulk. The breakthrough came when it was confirmed that the twin-boundaries in WO3 and related materials become superconducting at 3K while the bulk material remains an insulator [1]. Other materials such as BiFeO3 equally show conducting interfaces [11]; the experimental situation was well reviewed by Catalan et al. [12].

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: 2014AREP; IA68;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Page Range: pp. 428-429
Depositing User: Sarah Humbert
Date Deposited: 07 Nov 2014 14:25
Last Modified: 20 Nov 2014 13:40
URI: http://eprints.esc.cam.ac.uk/id/eprint/3148

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