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Magnetic excitations in mesoporous hematite
We have recently prepared mesoporous forms of various metals oxides. In some cases the imposition of a mesostructure changes other properties of the material significantly. One... -
The proton quantum states of the amorphous ices (MARI)
While we now have a complete picture of the average local and intermediate structures of the various amorphous ices, their dynamic behaviour (glass transition and defect... -
INS study of double perovskite at the border between two and three dimensiona...
Sr2CuWO6 is a double perovskite at the border between two and three dimensional magnetism, with a square lattice of S=1⁄2 Cu(II) ions. This proposal aims to use inelastic... -
Inelastic neutron scattering study of the metallic toroidal system UNi4B
There is considerable interest in understanding the magnetoelectric effect with the aim of developing technological applications. Until recently this has been limited to... -
The partial vibrational density of states for As2Se3 glass
The method of Se isotope substitution with inelastic neutron scattering will be used to measure the partial VDOS for As2Se3 glass. This is a prototypical network forming... -
Study of phonon density of states in PGEC titanate thermoelectrics
To understand the thermal conductivity suppression within PGEC titanate oxide thermoelectrics we hope to complement theoretical calculations performed on several perovskites... -
Spin gap and possible spin-dimer formation in Ce(Os1-xFex)2Al10 (X=0 to 1)
Our neutron study using MARI/MERLIN on Ce(Ru1-xFex) 2Al10 reveals very interesting magnetic excitations and a manuscript is ready to submit to PRB. In x=0 (TN=27 K) a... -
Magnetic excitations in the half-metallic shandite Co3Sn2S2
Co3Sn2S2 is a metallic ferromagnet with Tc = 177 K, which crystallizes in a shandite-type structure. Below the Curie temperature its electronic structure forms a half-metal... -
Study of vibron stability in CeCuxAl4-x with x = 0.95 and 1.05
CeCuxAl4-x compounds crystallize in the ordered non-centrosymmeric tetragonal BaNiSn3-type structure (space group 107, I4mm). The strong interaction between crystal field (CF)... -
Determination of the on-top vibrational mode of the surface hydride in PdH.
Finely divided supported palladium particles are used as catalysts in many technical processes. Using MAPS we have recently investigated the interaction of hydrogen with the... -
Inelastic neutron scattering investigation of Sr2CuTeO6
Isostructural Sr2CuBO6, B=W or Te, exhibit different magnetic structures k=[0 1/2 1/2] vs [1/2 1/2 0], leading to the suggestion of a reversal in the ratios of the nearest and... -
Inelastic Neutron Scattering study on new tetragonal compound Ce2PdGe3
Cerium-based Kondo lattice compounds have received great attention, owing mostly to the variety of exotic ground states that they exhibit (e.g., unconventional... -
Magnetic excitations in a pure Fe3+ pyrochlore lattice (FeF3) ¿ A classic spi...
We propose to study the powder averaged spin fluctuations in a S=5/2 pryochlore - FeF3. Previous studies, corroborated by our own diffraction work on WISH, have measured that... -
Study of vibron stability in CeCuxAl4-x, 0.7x1.1 through inel...
Considering interesting physical properties observed in CeCuxAl4-x our aim is to investigate the stability of vibron excitations, already observed in CeCuAl3, as a function of... -
Crystal field and magnetic excitations of the non-centrosymmetric heavy-fermi...
Several non-centrosymmetric heavy-fermion compounds have been reported to exhibit unconventional superconductivity (SC). For example, both CeRhSi3 and CeIrSi3 order... -
Ligand-field characterization and U-Pt bonding in uranium-based heterometalli...
We propose to investigate the magnetic excitation spectra of tetravalent uranium ions in two isostructural, one-dimesional chains made up by aligned UM2 units, with M = Pt and... -
Phonon Density of States in Nanocrystalline YAG:Cr
Here we propose to measure the phonon density of states in nanocrystalline samples of YAG:Cr. Our parallel luminscence measurements have revealed dramatic changes in the phonon... -
Inelastic Neutron Scattering study on PrRhSn3
Recently we have investigated the cubic compound PrRhSn3 using the dc and ac susceptibilities and the heat capacity. We found an evidence for the cluster-glass behavior with a... -
Magnetic excitations in the S=1/2 ferromagnetic semiconductor Lu2V2O7
Lu2V2O7 is a rare example of an S=1/2 pyrochlore. The fact that it is a ferromagnet with Tc=70 K belies the fact that it has some truly remarkable properties. These include the... -
Low Energy Dispersion of a Stripe-Ordered, Hole-Doped Antiferromagnet
Our previous studies of the hole-doped antiferromagnet La1.75Sr0.25CoO4 have shown the distinctive "Hour-Glass" dispersion attributed to magnetic and charge ordered stripes....