| EPSRC Reference: |
EP/G011230/1 |
| Title: |
Current-driven Domain Wall Motion in Artificial Magnetic Domain Structures |
| Principal Investigator: |
Bending, Professor SJ |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Physics |
| Organisation: |
University of Bath |
| Scheme: |
Standard Research |
| Starts: |
01 May 2009 |
Ends: |
31 January 2013 |
Value (£): |
431,296
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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| Related Grants: |
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| Panel History: |
| Panel Date | Panel Name | Outcome |
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30 Jul 2008
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Physics Prioritisation Panel Meeting
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Announced
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Summary on Grant Application Form |
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The interaction of spin-polarised currents with ferromagnetic domain walls is stimulating an immense amount of experimental and theoretical research activity worldwide. The resulting spintronic devices will combine the advantageous properties of magnetic and semiconductor materials, and are expected to be fast, non-volatile and versatile, capable of simultaneous data storage and processing, while at the same time consuming less energy. An exciting new approach to spintronic devices involves using spin polarised electric currents to either directly reverse the magnetisation direction in the region of interest, or 'push' a domain wall across it. The latter technique, so-called spin transfer torque-induced domain wall motion, promises the most efficient device functionality with the lowest switching current densities. Key outstanding issues in this area include reduction of the very large critical currents presently needed to induce wall motion and understanding the complex behaviour of propagating current-driven domain walls, both of which impact strongly upon potential applications in the field of spintronics. This collaborative proposal brings a novel approach to the design of optimised structures for current-driven wall motion, which will also yield a much better understanding of the physical mechanisms that control the critical current and domain wall behaviour. Our approach is to use focussed ion beam (FIB) irradiation to precisely control the local magnetic anisotropy of multilayer films and create artificial domain structures with dimensions <=30nm. In this way exquisite control over the critical current density for wall motion, as well as the domain structure and local coercive fields, will be achieved. The collaboration brings together expertise in the FIB modification of magnetic multilayer systems with both perpendicular and in-plane anisotropy and complementary magnetic and electrical measurements, as well as a strong theoretical strand that will address fundamental physical processes in the material structuring and magnetisation behaviour. The successful completion of the proposed research will yield new insights into the phenomenon of spin transfer torque in ferromagnetic films that will have strong potential for exploitation in future spintronic device technology.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.bath.ac.uk |