First evidence for a Sm${}^{3+}$-type contribution to the magnetic form factor in the quasielastic spectral response of intermediate valence SmB${}_6$

Abstract

The momentum transfer dependence of the magnetic form factor associated with the quasielastic spectral component in the dynamic magnetic response of intermediate valence SmB${}_6$ has been measured using inelastic neutron scattering on a double-isotope (${}^{154}$Sm, ${}^{11}$B) single crystal. The experimental dependence differs qualitatively from those obtained earlier for the inelastic signals, as well as from the field-induced magnetic form factor of SmB${}_6$ obtained by polarized neutron diffraction. This observation is interpreted by specifically considering the Curie-type contributions to the dynamic susceptibility, which arise from the mixing of 4f${}^5$ and 4f${}^6$ J-multiplets into the intermediate valence state wave function.

9 pages, 2 figures. Accepted for publication in JETP Lett

References in corpus (1)

• Magnetic spectral response and lattice properties in mixed-valence Sm1-x Yx S solid solutions studied with x-ray diffraction, x-ray absorption spectroscopy, and inelastic neutron scattering

Cited by in corpus (1)

• A RIXS investigation of the crystal-field splitting of Sm${}^{3+}$ in SmB${}_6$