| EPSRC Reference: |
EP/C000757/1 |
| Title: |
The physics of layered colbalt oxides |
| Principal Investigator: |
Lees, Professor MR |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Department: |
Physics |
| Organisation: |
University of Warwick |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
17 January 2005 |
Ends: |
16 January 2008 |
Value (£): |
232,398
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
Materials Synthesis & Growth |
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Summary on Grant Application Form |
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The transition metal oxides, including those containing cobalt, form a large family of materials with fascinating magnetic, electronic and structural properties including exotic superconductivity and unusual magnetic and spin states. The different possible oxidation states of cobalt - divalent, trivalent and tetravalent - together with its various spin configurations e.g. high, intermediate and low spin for Co3+ in a six fold co-ordination add an extra dimension to the numerous original phenomena seen in these materials.In this proposal we have chosen to focus our attention on three different classes of cobalt based materials, each of which features some of the most important problems in condensed matter physics, namely, charge and spin ordering, low dimensional magnetism, and unconventional superconductivity. These materials are: a new class of oxygen deficient RBaCo2O5.5 materials (where R=rare earth). These materials offer an opportunity to study a range of phenomena including spin state transitions, the interplay between structure, stoichiometry and charge/spin ordering, and phase segregation. a family of low dimensional oxides with the general formula A3MMO6 (A=Sr, Ca, M=Co, Ni, Cu, Fe or Zn and M=Rh, Pt or Ir). These materials exhibit highly anisotropic physical properties and provide exacting tests for the current models of low dimensional magnetic systems. the recently discovered layered superconductor NaxCoO2yH2O (x=0.35, y=1.4) whose physics appears to be related to both the high Tc and the Sr2RuO4 systems.Our experimental work will include the growth of single crystals of these materials using an infra red image furnace, laboratory based studies using magnetometry, heat capacity and transport measurements, and NMR spectroscopy. Neutron scattering will also be an essential component of this work.
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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.warwick.ac.uk |