First evidence for a Sm$^{3+}$-type contribution to the magnetic form factor in the quasielastic spectral response of intermediate valence SmB$_{6}$

1); 2); (2) National Research Nuclear University MEPhI; (3) Laboratoire L\'eon Brillouin; CEA Saclay; CNRS-CEA; France); J.-M. Mignot (3); Moscow; P. A. Alekseev (1

arxiv: 1604.06717 · v1 · pith:GWA3PF7Unew · submitted 2016-04-22 · ❄️ cond-mat.str-el

First evidence for a Sm³⁺-type contribution to the magnetic form factor in the quasielastic spectral response of intermediate valence SmB₆

P. A. Alekseev (1 , 2) , J.-M. Mignot (3) , P. S. Savchenkov (2 , 1) , V. Lazukov (1) ((1) National Research Centre "Kurchatov Institute" , Moscow , Russia

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(2) National Research Nuclear University MEPhI (3) Laboratoire L\'eon Brillouin CNRS-CEA CEA Saclay France)

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keywords magneticfactorformintermediatevalencedependencedynamicinelastic

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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.

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First evidence for a Sm³⁺-type contribution to the magnetic form factor in the quasielastic spectral response of intermediate valence SmB₆

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