Journal article
Anharmonic lattice interactions in improper ferroelectrics for multiferroic design
Journal of physics. Condensed matter, v 27(28), pp 283202-283202
22 Jul 2015
PMID: 26125654
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The design and discovery of new multiferroics, or materials that display both ferroelectricity and long-range magnetic order, is of fundamental importance for new electronic technologies based on low-power consumption. Far too often, however, the mechanisms causing these properties to arise are incompatible or occur at ordering temperatures below room temperature. One design strategy which has gained considerable interest is to begin with a magnetic material, and find novel ways to induce a spontaneous electric polarization within the structure. To this end, anharmonic interactions coupling multiple lattice modes have been used to lift inversion symmetry in magnetic dielectrics. Here we provide an overview of the microscopic mechanisms by which various types of cooperative atomic displacements result in ferroelectricity through anharmonic multi-mode coupling, as well as the types of materials most conducive to these lattice instabilities. The review includes a description of the origins of the displacive modes, a classification of possible non-polar lattice modes, as well as how their coupling can produce spontaneous polarizations. We then survey the recent improper ferroelectric literature, and describe how the materials discussed fall within a proposed classification scheme, offering new directions for the theoretical design of magnetic ferroelectrics. Finally, we offer prospects for the future discovery of new magnetic improper ferroelectrics, as well as detail remaining challenges and open questions facing this exciting new field.
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Details
- Title
- Anharmonic lattice interactions in improper ferroelectrics for multiferroic design
- Creators
- Joshua Young - Drexel UniversityAlessandro Stroppa - Consiglio Nazionale delle Ricerche—CNR-SPIN, L’Aquila, ItalySilvia Picozzi - Consiglio Nazionale delle Ricerche—CNR-SPIN, L’Aquila, ItalyJames M. Rondinelli - Northwestern University
- Publication Details
- Journal of physics. Condensed matter, v 27(28), pp 283202-283202
- Publisher
- Iop Publishing Ltd
- Number of pages
- 18
- Grant note
- DMR-1420620 / Penn State NSF-MRSEC Center for Nanoscale Science 2013-0726 / Fondazione Cariplo W911NF-15-1-0017 / Army Research Office
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000357498200002
- Scopus ID
- 2-s2.0-84936062071
- Other Identifier
- 991019330796004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Condensed Matter