Sodium reordering transition in sodium cobaltate (2008)
Morris, D. J. P., Roger, M., Gutmann, M. J., Goff, J. P., Tennant, D. A., Prabhakaran, D., ...
The sodium ordering in NaxCoO2 in the vicinity of room temperature is rationalised at high x in terms of phase transitions between square and striped phases. A complicated hexagon-of-hexagon...
Phase imaging using time-of-flight neutron diffraction (2006)
Gutmann, M J, Kockelmann, W, Chapon, L C, Radaelli, P G
A technique that allows the spatial distribution of crystallographic phases in the interior of an object to be reconstructed from neutron time-of-flight (TOF) diffraction is described. To this end,...
Moggach, S A, Allan, D R, Clark, S J, Gutmann, M J, Parsons, S, Pulham, C R, ...
The crystal structure of the orthorhombic phase of l-cysteine (hereafter l-cysteine-I) consists of chains of molecules linked via NH O hydrogen bonds. The chains are linked into a layer by other NH O...
Macroscopic quantum tunneling of protons in the KHCO3 crystal (2006)
Fillaux, F, Cousson, A, Gutmann, M J
Macroscopic quantum entanglement reveals an unforeseen mechanism for proton transfer across hydrogen bonds in the solid state. We utilize neutron scattering techniques to study proton dynamics in the...
On the Ordering of Na$^+$ Ions in Na$_x$CoO$_2$ (2005)
Roger, M., Morris, D. J. P., Tennant, D. A., Gutmann, M. J., Goff, J. P., Prabhakaran, D., ...
The influence of electrostatic interactions on the ordering of sodium ions in Na$_x$CoO$_2$ is studied theoretically through Monte-Carlo simulations. For large $x$ small di- or tri-vacancy clusters...
Patterning of sodium ions and the control of electrons in sodium cobaltate (2005)
Roger, M., Morris, D. J. P., Tennant, D. A., Gutmann, M. J., Goff, J. P., Hoffmann, J. U., ...
NaxCoO2 has emerged as a material of exceptional scientific interest due to the potential for thermoelectric applications, and because the strong interplay between the magnetic and superconducting...
An inelastic neutron scattering study of single-crystal heavy-fermion YbAgGe (2005)
Fåk, B, McMorrow, D F, Niklowitz, P G, Raymond, S, Ressouche, E, Flouquet, J, ...
Welberry, T R, Gutmann, M J, Woo, H, Goossens, D J, Xu, G, Stock, C, ...
Inelastic neutron scattering study of single crystal heavy fermion YbAgGe (2004)
Fak, B., McMorrow, D. F., Niklowitz, P. G., Raymond, S., Ressouche, E., Flouquet, J., ...
Single crystals of the heavy-fermion compound YbAgGe have been studied by neutron scattering. The magnetic ordering occurring below T1=0.5 K is characterized by a commensurate propagation vector...
Temperature-induced barium de-trapping from a double-well potential in Ba6Ge25 (2004)
Schmidt, M, Radaelli, P G, Gutmann, M J, Billinge, S J L, Hur, N, Cheong, S-W
Structural anomalies and multiferroic behavior in magnetically frustrated TbMn2O5 (2004)
Chapon, L C, Blake, G R, Gutmann, M J, Park, S, Hur, N, Radaelli, P G, ...
We have studied the magnetostructural phase diagram of multiferroic TbMn2O5 as a function of temperature and magnetic field by neutron diffraction. Dielectric and magnetic anomalies are found to be...
Temperature-induced barium de-trapping from a double-well potential in Ba6Ge25 (2003)
Schmidt, M., Radaelli, P. G., Gutmann, M. J., Billinge, S. J. L., Hur, N., Cheong, S. W.
The crystal structure of barium-germanium clathrate Ba6Ge25 was studied using neutron powder diffraction in the temperature range 20-300K. The compound was found to be cubic (S.G. P4_1 23) in the...
Diffuse neutron scattering in benzil, C14D10O2, using the time-of-flight Laue technique (2003)
Welberry, T R, Goossens, D J, David, W I F, Gutmann, M J, Bull, M J, Heerdegen, A P
Blake, G. R., Chapon, L., Radaelli, P. G., Argyriou, D. N., Gutmann, M. J., Mitchell, J. F.
The phase diagram of Pr0.65(CaySr1-y)0.35MnO3, 0.6