Search Results

You searched for all publications:

with publication states 'Published (Approved)'

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

Exact matches
Related results

2 items found (0 items not approved), displaying all items.1

Instruments / Technical Area	Publication Details	Published	Actions
I11-High Resolution Powder Diffraction	Hexagonal perovskite related oxide ion conductor Ba 3 NbMoO 8.5 : phase transition, temperature evolution of the local structure and properties Matthew S. Chambers , Kirstie S. Mccombie , Josie E. Auckett , Abbie C. Mclaughlin , John T. S. Irvine , Philip A. Chater , John S. O. Evans , Ivana Radosavljevic Evans Journal Of Materials Chemistry A 116 DOI: 10.1039/C9TA08378B Diamond Proposal Number(s): [19729] Show Abstract ▼ Abstract: Ba3NbMoO8.5 has recently been demonstrated to exhibit competitive oxide ion conductivity and to be stable under reducing conditions, making it an excellent potential electrolyte for solid oxide fuel cells. We report here the first investigation of the local structure in Ba3NbMoO8.5, carried out using variable-temperature neutron total scattering and pair distribution function (PDF) analysis. This work reveals a significant degree of disorder in the material, even at ambient conditions, in both the cation and the anion arrangements and suggests the prevalence of the five-fold Nb/Mo coordination. In addition, high resolution powder X-ray diffraction data indicate that the temperature-dependent structural changes in Ba3NbMoO8.5 are due to a first order phase transition, and reveal a previously unreported effect of thermal history on the room-temperature form of the material. PDF modelling shows that Ba3NbMoO8.5 has an essentially continuous oxygen distribution in the ab plane at 600 °C which leads to its high oxide-ion conductivity.	Oct 2019
I11-High Resolution Powder Diffraction	Spin dynamics in IrSr2Sm1.15Ce0.85Cu2O10: Complex magnetic behavior in a layered iridocuprate R. H. Colman , P. Manuel , D. D. Khalyavin , A. D. Hillier , A. C. Mclaughlin Physical Review B 88 (18), 8606-8615 DOI: 10.1103/PhysRevB.88.184408 Diamond Proposal Number(s): [7075] Show Abstract ▼ Abstract: A muon spin rotation (μSR), neutron, and synchrotron diffraction study of the reentrant spin-glass material IrSr 2 Sm 1.15 Ce 0.85 Cu 2 O 10 is presented. The synthesis has been optimized, and Rietveld refinement of the diffraction patterns shows no sign of the previously reported Ir/Cu cation exchange but confirms the structure along with the disordered tilts and rotations of IrO 6 octahedra. The zero-field-μSR response indicates a complex temperature dependence to the magnetism with multiple transitions that are confirmed to be bulk phenomena. Consecutive transitions are reported at t 1 = 140, t 2 = 20, and t 3 = 6 K. The broad transition at 140 K is assigned to antiferromagnetic ordering of Ir 4 + spins with a stripe spin structure. The low-temperature transitions are a result of antiferromagnetic ordering of Cu 2 + spins followed by the freezing of a disordered Ir spin component, further evidenced by a strong damping of the oscillation amplitude below 6 K. These observations confirm the bulk nature of the previously reported reentrant spin-glass behavior of this complex magnetic system.	Nov 2013

Publications Database

Search Results

You searched for all publications:

Search Again...

Subject Areas (check all that apply) select all

Instruments used to collect data (check all that apply) select all

Collaborations involved (check all that apply) select all

Diamond Offline Facilities used

Relevant Technical Areas (check all that apply) select all

Menu for Anonymous User