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Instruments / Technical Area	Publication Details	Published	Actions
I11-High Resolution Powder Diffraction	A multidisciplinary combinatorial approach for tuning promising hydrogen storage materials towards automotive applications A. Amieiro-Fonseca , S. R. Ellis , C. J. Nuttall , B. E. Hayden , S. Guerin , G. Purdy , J.-P. Soulie , S. K. Callear , S. D. Culligan , W. I. F. David , P. P. Edwards , M. O. Jones , S. R. Johnson , A. H. Pohl Faraday Discussions 151, 369-384 DOI: 10.1039/c0fd00018c Diamond Proposal Number(s): [501291] Show Abstract ▼ Abstract: HyStorM is a multidisciplinary hydrogen-storage project aiming to synthesise and tune materials hydrogen storage properties for automotive applications. Firstly, unique high-throughput combinatorial thin-film technologies are used to screen materials' hydrogen storage properties. Then promising thin-film candidate compositions are synthesised and examined in the bulk. In this paper, we report on our results within the ternary compositions Mg-Ti-B and Ca-Ti-B. Primary screening of the Mg-Ti-B ternary identified a high capacity hotspot corresponding to Mg0.36Ti0.06B0.58, with 10.6 wt% H2 capacity. Partial reversibility has been observed for this material in the thin-film. Bulk Ti-doped Mg(BH4)2 composites show rehydrogenation to MgH2 under the conditions used. The synthesised thin-film Ca-Ti-B ternary showed only low hydrogen storage capacities. In the bulk, Ti-doping experiments on Ca(BH4)2 demonstrated reversible storage capacities up to 5.9 wt% H2. Further characterisation experiments are required to decipher the role of the Ti-dopant in these systems in both films and in the bulk.	May 2011
	Spin dynamics in Sr3Ru2O7 near the metamagnetic transition by inelastic neutron scattering S. Ramos , E. M. Forgan , C. Bowell , S. M. Hayden , A. J. Schofield , A. Wildes , E. A. Yelland , S. P. Brown , M. Laver , R. S. Perry , Y. Maeno Physica B: Condensed Matter 403, 1270-1272 DOI: 10.1016/j.physb.2007.10.123 Show Abstract ▼ Abstract: The bilayered ruthenate Sr3Ru2O7Sr3Ru2O7 has a metamagnetic quantum critical point. This is the first example of a material with a quantum-critical end-point. This work addresses the problem of the metamagnetic criticality in this system through the measurement of spin fluctuations by inelastic neutron scattering. Our results show that incommensurate antiferromagnetic fluctuations are present in a wide range of applied fields. We have also observed how ferromagnetic fluctuations develop at the metamagnetic field. Finally, the intensity of the two types of fluctuations is followed as a function of the energy transfer between the neutron and the spins.	Apr 2008

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