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11 papers · 2 filters
Vacancy defects and monopole dynamics in oxygen-deficient pyrochlores
G. Sala, M. J. Gutmann, D. Prabhakaran +6
The idea of magnetic monopoles in spin ice has enjoyed much success at intermediate temperatures, but at low temperatures a description in terms of monopole dynamics alone is insuf…
The elevated Curie temperature and half-metallicity in the ferromagnetic semiconductor LaEuO
Pedro M. S. Monteiro, Peter J. Baker, Nicholas D. M. Hine +9
Here we study the effect of La doping in EuO thin films using SQUID magnetometry, muon spin rotation (SR), polarized neutron reflectivity (PNR), and density functional theory (D…
Long range antiferromagnetic order of formally non-magnetic Eu Van Vleck ions observed in multiferroic EuYMnO
Arvid Skaugen, Enrico Schierle, Gerrit van der Laan +4
We report on resonant magnetic x-ray scattering and absorption spectroscopy studies of exchange-coupled antiferromagnetic ordering of Eu magnetic moments in multiferroic Eu$…
Structural and Magnetic Investigations of Single-Crystals of the Neodymium Zirconate Pyrochlore, Nd2Zr2O7
M. Ciomaga Hatnean, M. R. Lees, O. A. Petrenko +5
We report structural and magnetic properties studies of large high quality single-crystals of the frustrated magnet, NdZrO. Powder x-ray diffraction analysis confirms t…
Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate
D. G. Porter, M. Roger, M. J. Gutmann +5
We have grown single crystals of NaCaCoO and determined their superstructures as a function of composition using neutron and x-ray diffraction. Inclusion of Ca s…
A High Pressure Neutron Study of Colossal Magnetoresistant NdMnAsO0.95F0.05
E. J. Wildman, M. G. Tucker, A. C. Mclaughlin
A high pressure neutron diffraction study of the oxypnictide NdMnAsO0.95F0.05 has been performed at temperatures of 290 K - 383 K and pressures up to 8.59 GPa. The results demonstr…