| EPSRC Reference: |
GR/R99904/01 |
| Title: |
Optical orientation and relaxation of spin in metals |
| Principal Investigator: |
Hickey, Professor B |
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| Department: |
Physics and Astronomy |
| Organisation: |
University of Leeds |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
24 April 2003 |
Ends: |
23 April 2005 |
Value (£): |
6,228
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| EPSRC Research Topic Classifications: |
| Magnetism/Magnetic Phenomena |
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Summary on Grant Application Form |
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Describe the proposed research in about 200 words.Control of spin orientation is essential for the operation of magnetoelectronic devices. Following our recent observation of optical orientation and elaxation of spins in aluminium, we propose to study the optical orientation and relaxation of spins in a wider variety metals. The values that we c or the spin relaxation time will be of immediate relevance in the interpretation of magnetotransport phenomena. We will also explore whether opti Orientation can be used to influence the process of optically induced ultrafast demagnetisation. By optically orienting a small number of spins after demagnetisation has been induced, we aim to control the direction in which the spontaneous magnetisation recovers. This will be the first demonstration of all-optical ultrafast magnetic switching. We will also make measurements upon multilayered structures in order to explore how ballistic transport of spin-polarised hot electrons between layers affects the efficiency of optical orientation and demagnetisation. These structures nclude magnetic tunnel junctions in which a bias voltage can continuously tune the transfer of optically excited hot electrons across the tunnel barr 3y selective removal and injection of spin-polarised hot electrons we will determine the value of the intrinsic demagnetisation time and so test the misting theory of the ultrafast demagnetization effect.
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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.leeds.ac.uk |