Zobrazeno 1 - 10 of 209 pro vyhledávání: '"R A, Ewings"'
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Akademický článek
Spin-orbital correlations from complex orbital order in MgV_{2}O_{4}
Autor: H. Lane, P. M. Sarte, K. Guratinder, A. M. Arevalo-Lopez, R. S. Perry, E. C. Hunter, T. Weber, B. Roessli, A. Stunault, Y. Su, R. A. Ewings, S. D. Wilson, P. Böni, J. P. Attfield, C. Stock
Publikováno v: Physical Review Research, Vol 5, Iss 4, p 043146 (2023)
MgV_{2}O_{4} is a spinel based on magnetic V^{3+} ions, which host both spin (S=1) and orbital (l_{eff}=1) moments. Owing to the underlying pyrochlore coordination of the magnetic sites, the spins in MgV_{2}O_{4} only antiferromagnetically order once
Externí odkaz: https://doaj.org/article/27d0edcb437842e2b60fa8e7caa037d5
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2
Magnon dispersion in ferromagnetic SrRuO3
Autor: K. Jenni, S. Kunkemöller, A. Tewari, R. A. Ewings, Y. Sidis, A. Schneidewind, P. Steffens, A. A. Nugroho, M. Braden
Publikováno v: Physical Review B. 107
The magnetic excitations in ferromagnetic SrRuO$_3$ were studied by inelastic neutron scattering combining experiments on triple-axis and time-of-flight spectrometers with and without polarization analysis. A quadratic spin-wave dispersion with an an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55de59c83cff4e12b5d17486bb3d0b84
https://doi.org/10.1103/physrevb.107.174429
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4
Magnetic dynamics of NiPS3
Autor: A. R. Wildes, J. R. Stewart, M. D. Le, R. A. Ewings, K. C. Rule, G. Deng, K. Anand
Publikováno v: Physical Review B
Physical Review B, 2022, 106 (17), pp.174422. ⟨10.1103/PhysRevB.106.174422⟩
International audience; Neutron spectroscopy measurements have been performed on single crystals of the antiferromagnetic van der Waals compound NiPS3. Linear spin-wave theory using a Heisenberg Hamiltonian with single-ion anisotropies has been appli
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::172e23459e37455b44060f4686aff092
https://doi.org/10.1103/physrevb.106.174422
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6
Upgrade to the MAPS neutron time-of-flight chopper spectrometer
Autor: J. R. Stewart, S. P. Waller, R. A. Ewings, D.E. Pooley, Goran Škoro, C. A. Smith, Toby Perring, Manh Duc Le, Robert Bewley, D. Zacek, R. C. Riehl-Shaw, D. Raspino
The MAPS direct geometry time-of-flight chopper spectrometer at the ISIS pulsed neutron and muon source has been in operation since 1999 and its novel use of a large array of position-sensitive neutron detectors paved the way for a later generations
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4944e3e514f897a5c1547e5389214b6
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7
The use of selected neutron absorption resonance filters to suppress spurious events on hot neutron spectrometers
Autor: J. R. Stewart, R. A. Ewings, M. Jimenez-Ruiz, Henrik M. Rønnow, D. Lançon
Publikováno v: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND
Resonant absorption can be used as a filter for high energy neutron spectroscopy. Here we report the transmission of eight thin foil filters: erbium, indium, iridium, dysprosium, hafnium, gadolinium, cadmium and samarium, measured using neutron time-
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::629523519d5bd19a15ee671b07cbaa1e
https://infoscience.epfl.ch/record/207261?ln=en
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9
X-ray resonant scattering study of the magnetic phase diagram of multiferroic TbMnO 3
Autor: D. Prabhakaran, D. F. McMorrow, Federica Fabrizi, Luigi Paolasini, D. Mannix, Stuart Wilkins, Claudio Mazzoli, Helen Walker, Andrew T. Boothroyd, R. A. Ewings
Publikováno v: Physica B: Condensed Matter. 404:3264-3266
We present the magnetic phase diagram of multiferroic TbMnO3 for H ∥ b determined using X-ray resonant scattering at the Tb L3-edge. Investigations of two different magnetic domains, C-type and F-type, demonstrate very similar behaviour in high app
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da2bc8b0b69785749f16666e58263357
https://doi.org/10.1016/j.physb.2009.07.085
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10
Absence of strong magnetic fluctuations in FeP-based systems LaFePO and Sr₂ScO₃FeP
Autor: A E, Taylor, R A, Ewings, T G, Perring, D R, Parker, J, Ollivier, S J, Clarke, A T, Boothroyd
Publikováno v: Journal of physics. Condensed matter : an Institute of Physics journal. 25(42)
We report neutron inelastic scattering measurements on polycrystalline LaFePO and Sr2ScO3FeP, two members of the iron phosphide families of superconductors. No evidence is found for any magnetic fluctuations in the spectrum of either material in the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::7dcabed06296b80b85d17ab34eb3328a
https://pubmed.ncbi.nlm.nih.gov/24065357
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