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High-energy spin excitations in the optimally doped Ba0.67K0.33Fe2As2
From our previous data on BaFe2As2 and BaFe1.9Ni0.1As2, one may assume that the superconductivity only affects the low energy excitations. But for Ba0.67K0.33Fe2As2, the doping... -
Quasi-elastic Neutron Scattering Studies of Diffusion in Mordenite Catalysts ...
This proposal will use QENS to investigate the diffusion of propane and methylacetate in mordenite zeolite catalysts used for the carbonylation of dimethylether to make... -
Excitation spectrum of the quantum critical S=1/2 ladder material Ba2CuTeO6
Ba2CuTeO6 is a recently discovered S=1/2 spin ladder system containing Cu2+ ladders. Our experiments indicate that it is extremely close to the theoretically predicted quantum... -
Dynamical Transitions in the Ogg Glasses
We request 4 days on IRIS to study the temperature dependance of the structural dynamics in amorphous sodium-ammonia (Na-NH3). This will be the first investigation of the... -
Neutron Scattering, Agricultural Wastes, Concrete & Water mobility: What can ...
In recent years, the research related to agricultural wastes aiming to evaluate their potential for recycling as well as the elimination of the landfills increased dramatically.... -
Investigation of Crystal and Magnetic Structures in high pressure synthesized...
Three new doubly ordered perovskites NaYMWO6 (M=Mn, Co & Ni) have been synthesized by high pressure and high temperature. Analysis of room temperature laboratory X-ray... -
PROTON DYNAMICS IN ALKYLAMMONIUM NITRATE IONIC LIQUIDS
Ionic liquids are of interest to chemistry and material sciences because of their designer properties. Protonated ionic liquids are excellent proton carriers in fuel cell... -
Magnetic coupling-scheme of {Cr10} wheels with S=9 ground state
Molecular magnetic wheels are models systems for the study of quantum coherence, finite-size effects and have been proposed as possible candidates for quantum bits. While AF... -
An INS study of amorphous and crystalline nitric acid: observing the phase ch...
Nitric acid plays important roles in the atmosphere, in all aggregate states and combined with water.During the last periode we were running the proposal RB1110207 "Metastable... -
Nature of Disorder in Relaxor-like Ferroelectric AB(HCO2)3 Frameworks
Relaxor ferroelectics are of significant interest for use as piezoelectric actuators in sensing applications and for high precision mechanical stages. Relaxors are traditionally... -
Doping Dependence of the Resonant Spin Excitation in Ba1-xKxFe2As2
We recently observed a resonant spin excitation in Ba0.6K0.4Fe2As2, one of the newly discovered iron arsenide superconductors with Tc=38K, on MERLIN. This demonstrates that the... -
Investigation of the phase diagram of Ba1-xNaxTi2Sb2O (WISH portion)
We propose using WISH and HRPD to examine the structure of the Ba1-xNaxTi2Sb2O phase diagram as a function of temperature. The primary goals are the determination of the... -
Inelastic neutron scattering study of spin gap formation in two forms of BaRuO3
Pseudogap phenomena, which are associated with the reduction in the density of states at EF, have been intensively investigated in HTSC, as well in heavy fermion systems through... -
Thermal expansion and simultaneous Raman spectroscopy of methanol ammoniates,...
We have recently determined the structures of methanol-monoammoniate, and Me-hemiammoniate from neutron powder data. These are found to have different degrees of C-H...O... -
Spin excitations in the superconducting FeTe0.6Se0.4
The FeTe1-xSex series exhibits superconductivity over a broad range of doping. Previously we have made extensive neutron scattering measurements on superconducting x = 0.49 and... -
Magnetic excitations in a spin-liquid candidate K2Ni2(SO4)3
In majority of magnetic compounds interactions between spins, that reside on magnetic ions, result in a long-range ordered state below a critical temperature. In some materials... -
Cation Ordering and Magnetic Properties of Layered Tellurides
We have prepared a new non-stoichiometric series Cr2-xInxGe2Te6. X-ray diffraction data can be indexed on the rhombohedral unit cell of the end-member (x=0) phase. This adopts a... -
The nature of the Ferroelectric Phase in CdTiO3
The aim of the present proposal is to establish the structure of the ferroelectric phase of CdTiO3 and to determine the nature of the ferroelectric-paraelectric phase... -
Neutron Diffraction study on two novel topological Dirac semimetal candidates...
Dirac fermions with linear energy dispersion with momentum space have been of current interest for spintronic applications because a variety of quantum transport phenomena... -
Does elastic twinning play a role in the thermal expansion behaviour of polyc...
We request two days of beam-time on POLARIS to obtain high resolution measurements of the thermal expansion of dolomite [CaMg(CO3)2]. The experiment forms part of a larger...
