| EPSRC Reference: |
GR/T09866/01 |
| Title: |
Novel electronic states in frustrated metallic magnets |
| Principal Investigator: |
Grosche, Professor FM |
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| Department: |
Physics |
| Organisation: |
Royal Holloway, Univ of London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 September 2004 |
Ends: |
31 December 2007 |
Value (£): |
272,845
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| EPSRC Research Topic Classifications: |
| Magnetism/Magnetic Phenomena |
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| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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Seeking out materials balanced on the tightrope between competing ground states - the study of quantum critical points - is a highly successful guiding principle for exploring the collective states the electron liquid in complex metals may assume.Geometric frustration, which gives rise to degenerate manifolds of spin configurations, provides a promising and - in the case of metallic magnets - largely unexplored avenue towards reaching high electronic densities of states. The frustrated d-metal heavy fermion LiV204 constitutes so far the most dramatic example of such a mechanism.We propose to study families of narrow-band metals with lattice structures conducive to geometric frustration. In contrast to frustration in insulators, metallic candidate materials in which geometric frustration has helped to reduce the magnetic ordering temperature sufficiently, can be tuned by increasing dynamical frustration - the hopping of spin-disordered band electrons onto and off localised states - under hydrostatic pressure. It should be easier to reach a magnetic quantum critical point in metals, the expected phenomena can be more diverse and there is a potential route towards future device materials. For this investigation, new experimental techniques will be developed, including (a) measurement of the specific heat capacity and Hall effect under pressure and into the mK temperature range, (b) adiabatic demagnetisation refrigeration using a PPMS commercial cryostat and (c) transport measurements in anvil cells with a liquid pressure medium.
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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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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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