Anisotropic intermediate valence in Yb2M3Ga9 (M = Rh, Ir)
The intermediate valence compounds Yb{sub 2}M{sub 3}Ga{sub 9} (M = Rh, Ir) exhibit an anisotropic magnetic susceptibility. We report measurements of the temperature dependence of the 4f occupation number, n{sub f}(T), for Yb{sub 2}M{sub 3}Ga{sub 9} as well as the magnetic inelastic neutron scattering spectrum S{sub mag}({Delta}E) at 12 and 300 K for Yb{sub 2}Rh{sub 3}Ga{sub 9}. Both n{sub f}(T) and S{sub mag}({Delta}E) were calculated for the Anderson impurity model with crystal field terms within an approach based on the non-crossing approximation. These results corroborate the importance of crystal field effects in these materials; they also suggest that Anderson lattice effects are important to the physics of Yb{sub 2}M{sub 3}Ga{sub 9}.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of Basic EnergySciences; Agencia Nacional de Promocion Cientifica y Tecnologica, Consejode Investigaciones Cientificas y Tecnicas
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 877621
- Report Number(s):
- LBNL-57499; R&D Project: 403005; BnR: KC0302030; TRN: US0601625
- Journal Information:
- Physical Review B, Vol. 72; Related Information: Journal Publication Date: 2005
- Country of Publication:
- United States
- Language:
- English
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