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170 results on '"Givord, F."'

1. Crystal-fields in YbInNi4 determined with magnetic form factor and inelastic neutron scattering

Author

Severing, A., Givord, F., Boucherle, J. -X., Willers, T., Rotter, M., Fisk, Z., Bianchi, A., Fernandez-Diaz, M. T., Stunault, A., Rainford, B. D., Taylor, J., and Goremychkin, E.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

The magnetic form factor of YbInNi4 has been determined via the flipping ratios R with polarized neutron diffraction and the scattering function S(Q,w) was measured in an inelastic neutron scattering experiment. Both experiments were performed with the aim to determine the crystal-field scheme. The magnetic form factor clearly excludes the possibility of a \Gamma7 doublet as the ground state. The inelastic neutron data exhibit two, almost equally strong peaks at 3.2 meV and 4.4 meV which points, in agreement with earlier neutron data, towards a \Gamma8 quartet ground state. Further possibilities like a quasi-quartet ground state are discussed., Comment: 7 pages, 5 figures, 2 tables, submitted to PRB

Published
2010
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2. Low energy magnetic excitation spectrum of the unconventional ferromagnet CeRh$_{3}$B$_{2}$

Author

Raymond, S., Panarin, J., Givord, F., Murani, A. P., Boucherle, J. X., and Lejay, P.

Subjects
Condensed Matter - Strongly Correlated Electrons
Abstract

The magnetic excitation spectrum of the unconventional ferromagnet CeRh$_{3}$B$_{2}$ was measured by inelastic neutron scattering on single crystal sample in the magnetically ordered and paramagnetic phases. The spin-wave excitation spectrum evidences high exchange interaction along the c-axis about two orders of magnitude higher than the ones in the basal plane of the hexagonal structure. Both strong out of plane and small in plane anisotropies are found. This latter point confirms that considering the $J$=5/2 multiplet alone is not adequate for describing the ground state of CeRh$_{3}$B$_{2}$. Quasielastic scattering measured above $T_{Curie}$ is also strongly anisotropic between the basal plane and the c-axis and suggests localized magnetism., Comment: 8 Figures

Published
2010
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3. Crystal fields in YbInNi4 determined with magnetic form factor and inelastic neutron scattering

Author

Severing, A, Givord, F, Boucherle, J-X, Willers, T, Rotter, M, Fisk, Z, Bianchi, A, Fernandez-Diaz, MT, Stunault, A, Rainford, BD, Taylor, J, and Goremychkin, E

Subjects
Physical Sciences, Chemical Sciences, Engineering, Fluids & Plasmas
Abstract

The magnetic form factor of YbInNi4 has been determined via the flipping ratios R with polarized neutron diffraction, and the scattering function S(Q,ω) was measured in an inelastic neutron scattering experiment. Both experiments were performed with the aim of determining the crystal-field scheme. The magnetic form factor clearly excludes the possibility of a Γ7 doublet as the ground state. The inelastic neutron data exhibit two almost equally strong peaks at 3.2 meV and 4.4 meV which points, in agreement with earlier neutron data, toward a Γ8 quartet ground state. Further possibilities such as a quasiquartet ground state are discussed. © 2011 American Physical Society.

Published
2011

13. Uranium Form Factors in Selected UTX Compounds

Author

Pavel Javorský, Schweizer, J., Givord, F., Boucherle, J. X., Sechovsky, V., Andreev, A. V., Lelievre-Berna, E., Bourdarot, F., JRC Institute for Transuranium Elements [Karlsruhe] (ITU ), European Commission - Joint Research Centre [Karlsruhe] (JRC), Magnétisme et Diffusion Neutronique (MDN), Modélisation et Exploration des Matériaux (MEM), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), J. Heyrovský Institute of Physical Chemistry of the ASCR, Czech Academy of Sciences [Prague] (CAS), Institut Laue-Langevin (ILL), and Charles University [Prague] (CU)

Subjects
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
Abstract

International audience

Published
2003

41. Magnetization density in Ce3Al11

Author

Munoz, A, primary, Batallan, F, additional, Boucherle, J X, additional, Givord, F, additional, Lapertot, G, additional, Ressouche, E, additional, and Schweizer, J, additional

Published
1995
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