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Alpha-CaCr2O4: magnetic study of a new case of triangulaire Cr-lattice
We propose to study a layered oxide in which chromium cations describe a triangular array. Itseems us that no magnetic data are reported up to now for this alpha-CaCr2O4... -
Structure and cation ordering in A2Sn3Q7-type phases (A=In, Cr; Q= S, Se)
We wish to exploit the contrast afforded by neutrons to study the ordering of In and Sn cations in indium tin chalcogenides. Cation ordering has been inferred from spectroscopic... -
Misfit and Misfit Release in Co-Co3(Al,W) Superalloys
The effect of alloying additions (Ni, Fe, Cr, Ta, Mo, V, Ti, Si) on the misfit of developmental Co-Al-W alloys will be examined using Polaris. The Co3(Al,W) precipitate phase... -
Thermal expansion and phase transition in magnesium sulfate trihydrate
A recent single-crystal study determined the crystal structure of MgSO4.3D2O, and discovered that a first-order phase transition occurs when the crystal is cooled below 245 K.... -
Magnetic and Structural Studies on Oxychalcogenides
In this proposal we request 3 days of beam time on HRPD to study the structures (both atomic and magnetic) of a variety of oxychalcogenide phases: La2O2Se2Fe2O, Ce2O2Se2Mn and... -
Structural chemistry and magnetic order of the Aurivillius material Bi2CoO2F4
Materials with long range ferroelectric or magnetic order are important for applications including data storage, and a current key research area in functional materials is the... -
Neutron Total Scattering Investigation of LaCoxMn1-xO3 Perovskites
The perovskite structure with general formula ABX3 describes many hundreds (if not thousands) of materials. Many have interesting and technologically important properties. The... -
Verification of the charge ordered superstructure in YBaMn2O6
A definite understanding of the charge ordering phenomenon in the manganites has still not been reached, even for the case of prototype R1/2Ca1/2MnO3 manganites. In such... -
High Resolution Powder Diffraction of Manganites to Determine Bond Lengths as...
Manganites show promise as magnetocaloric materials - for use in solid-state refrigeration - in terms of cost, durability and tunable thermal conductivity. By tuning the... -
Order-disorder and phase transitions in the LiFeO2 cathode materials
Despite the importance of the LiFeO2 phases as cathode materials in lithium ion batteries, little is known about their crystal structures, except that they should be based on... -
The Definitive Sodium Niobate Phase Diagram?
NaNbO3 has long been regarded as the 'most complex' perovskite known, with at least seven different phases reported as a function of T, at least two of which have evaded all... -
Investigation of the hydrogen-bonded zero area expansion material 4-chloroimi...
We will investigate the structure of 4-chloroimidazole a material which undergoes extreme anisotropic thermal expansion. This is believed from our initial X-ray data to be due... -
The elusive ¿cubic¿ phase of BiFeO3 and related materials
We wish to probe the suggested existence of a high-temperature cubic perovskite phase in the multiferroic material BiFe0.7Mn0.3O3. The parent phase of this material, BiFeO3, was... -
Neutron diffraction and µSR investigation on YbPd
YbPd crystallizes in the cubic CsCl-type structure and reported to have magnetically ordered ground state with the mixed valence of the Yb ion. Further, it under goes through... -
Structural evolution and negative thermal expansion of Sr2IrO4
Sr2IrO4 is an important material in condensed matter physics, displaying a novel Jeff=½ Mott insulating state and being a rare comparative system for understanding the high... -
Crystal and magnetic structures of new 2D and 3D oxyselenides La2O2Se2M (M = ...
In this proposal we request 4 days of beamtime on GEM to study four new transition metal oxyselenide materials. Two new layered oxyselenides, La2O2Se2Mn and La2O2Se2Fe have been... -
Correlation of structures, compositions and magnetism of copper-deficient lay...
This experiment will investigate three related systems which contain copper deficient anti-fluorite-type copper sulfide layers. The overall aim is to correlate magnetic and... -
Probing Novel Phenomena in Sodium Bismuth Titanate
Sodium Bismuth Titanate, Na0.5Bi0.5TiO3 (NBT) is a mixed A-site perovskite. It is both of commercial interest, due to its usage in lead-free piezoelectric solid-solutions; and... -
The crystal structure of a Co(II) cubane single-molecule magnet
Single molecule magnetism is a low temperature phenomenon. Even though there have been thousands of papers published in the area, there are no structural data at all for any... -
Structural phase diagram of rare earth substituted multiferroic BiFeO3 - revi...
BiFeO3 is the most widely studied multiferroic and rare earth doping overcomes problems associated with phase metastability and leakage which have hampered applications. We...
